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Finding the Fourth Proportional to 72,700.31, 100,326.58 and 40,869.47

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Solution

The fourth proportional to 72,700.31, 100,326.58 and 40,869.47 is: 56,399.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.31 : 100,326.58 = 40,869.47 : x
  2. Step 2: Convert to fraction form
    72,700.31/100,326.58 = 40,869.47/x
  3. Step 3: Cross multiply
    72,700.31x = 100,326.58 × 40,869.47
  4. Step 4: Simplify right side
    72,700.31x = 4,100,293,547.71
  5. Step 5: Solve for x
    x = 4,100,293,547.71/72,700.31
  6. Step 6: Final answer
    x = 56,399.95

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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.