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Finding the Fourth Proportional to 101,151, 139,592.76 and 56,439

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Solution

The fourth proportional to 101,151, 139,592.76 and 56,439 is: 77,888.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,151 : 139,592.76 = 56,439 : x
  2. Step 2: Convert to fraction form
    101,151/139,592.76 = 56,439/x
  3. Step 3: Cross multiply
    101,151x = 139,592.76 × 56,439
  4. Step 4: Simplify right side
    101,151x = 7,878,475,781.64
  5. Step 5: Solve for x
    x = 7,878,475,781.64/101,151
  6. Step 6: Final answer
    x = 77,888.26

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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.