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Finding the Fourth Proportional to 101,387.86, 139,916.15 and 56,068.89

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Solution

The fourth proportional to 101,387.86, 139,916.15 and 56,068.89 is: 77,375.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,387.86 : 139,916.15 = 56,068.89 : x
  2. Step 2: Convert to fraction form
    101,387.86/139,916.15 = 56,068.89/x
  3. Step 3: Cross multiply
    101,387.86x = 139,916.15 × 56,068.89
  4. Step 4: Simplify right side
    101,387.86x = 7,844,943,223.57
  5. Step 5: Solve for x
    x = 7,844,943,223.57/101,387.86
  6. Step 6: Final answer
    x = 77,375.57

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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.