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Finding the Fourth Proportional to 100,240.72, 138,332.30 and 54,300.47

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Solution

The fourth proportional to 100,240.72, 138,332.30 and 54,300.47 is: 74,934.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,240.72 : 138,332.30 = 54,300.47 : x
  2. Step 2: Convert to fraction form
    100,240.72/138,332.30 = 54,300.47/x
  3. Step 3: Cross multiply
    100,240.72x = 138,332.30 × 54,300.47
  4. Step 4: Simplify right side
    100,240.72x = 7,511,507,943.02
  5. Step 5: Solve for x
    x = 7,511,507,943.02/100,240.72
  6. Step 6: Final answer
    x = 74,934.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.