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Finding the Fourth Proportional to 191,140.20, 286,839.90 and 124,417.80

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Solution

The fourth proportional to 191,140.20, 286,839.90 and 124,417.80 is: 186,711.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,140.20 : 286,839.90 = 124,417.80 : x
  2. Step 2: Convert to fraction form
    191,140.20/286,839.90 = 124,417.80/x
  3. Step 3: Cross multiply
    191,140.20x = 286,839.90 × 124,417.80
  4. Step 4: Simplify right side
    191,140.20x = 35,687,989,310.22
  5. Step 5: Solve for x
    x = 35,687,989,310.22/191,140.20
  6. Step 6: Final answer
    x = 186,711.06

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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.