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Finding the Fourth Proportional to 128,952,901.80, 193,429,352.70 and 83,036,399.40

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Solution

The fourth proportional to 128,952,901.80, 193,429,352.70 and 83,036,399.40 is: 124,554,599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952,901.80 : 193,429,352.70 = 83,036,399.40 : x
  2. Step 2: Convert to fraction form
    128,952,901.80/193,429,352.70 = 83,036,399.40/x
  3. Step 3: Cross multiply
    128,952,901.80x = 193,429,352.70 × 83,036,399.40
  4. Step 4: Simplify right side
    128,952,901.80x = 16,061,676,986,480,668
  5. Step 5: Solve for x
    x = 16,061,676,986,480,668/128,952,901.80
  6. Step 6: Final answer
    x = 124,554,599.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.