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Finding the Fourth Proportional to 101,398.69, 139,927.66 and 56,079.19

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Solution

The fourth proportional to 101,398.69, 139,927.66 and 56,079.19 is: 77,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,398.69 : 139,927.66 = 56,079.19 : x
  2. Step 2: Convert to fraction form
    101,398.69/139,927.66 = 56,079.19/x
  3. Step 3: Cross multiply
    101,398.69x = 139,927.66 × 56,079.19
  4. Step 4: Simplify right side
    101,398.69x = 7,847,029,831.40
  5. Step 5: Solve for x
    x = 7,847,029,831.40/101,398.69
  6. Step 6: Final answer
    x = 77,387.88

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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.