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Finding the Fourth Proportional to 70,231.61, 96,918.95 and 38,400.17

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Solution

The fourth proportional to 70,231.61, 96,918.95 and 38,400.17 is: 52,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,231.61 : 96,918.95 = 38,400.17 : x
  2. Step 2: Convert to fraction form
    70,231.61/96,918.95 = 38,400.17/x
  3. Step 3: Cross multiply
    70,231.61x = 96,918.95 × 38,400.17
  4. Step 4: Simplify right side
    70,231.61x = 3,721,704,156.22
  5. Step 5: Solve for x
    x = 3,721,704,156.22/70,231.61
  6. Step 6: Final answer
    x = 52,991.87

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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.