Home / 85,548,460.80-128,448,662.40-66,400,838.40

Finding the Fourth Proportional to 85,548,460.80, 128,448,662.40 and 66,400,838.40

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Solution

The fourth proportional to 85,548,460.80, 128,448,662.40 and 66,400,838.40 is: 99,699,033.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548,460.80 : 128,448,662.40 = 66,400,838.40 : x
  2. Step 2: Convert to fraction form
    85,548,460.80/128,448,662.40 = 66,400,838.40/x
  3. Step 3: Cross multiply
    85,548,460.80x = 128,448,662.40 × 66,400,838.40
  4. Step 4: Simplify right side
    85,548,460.80x = 8,529,098,874,718,556
  5. Step 5: Solve for x
    x = 8,529,098,874,718,556/85,548,460.80
  6. Step 6: Final answer
    x = 99,699,033.68

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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.