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Finding the Fourth Proportional to 101,710.71, 140,347.80 and 56,388.27

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Solution

The fourth proportional to 101,710.71, 140,347.80 and 56,388.27 is: 77,808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,710.71 : 140,347.80 = 56,388.27 : x
  2. Step 2: Convert to fraction form
    101,710.71/140,347.80 = 56,388.27/x
  3. Step 3: Cross multiply
    101,710.71x = 140,347.80 × 56,388.27
  4. Step 4: Simplify right side
    101,710.71x = 7,913,970,166.61
  5. Step 5: Solve for x
    x = 7,913,970,166.61/101,710.71
  6. Step 6: Final answer
    x = 77,808.62

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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.