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Finding the Fourth Proportional to 93,310.70, 139,966.05 and 55,985.90

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Solution

The fourth proportional to 93,310.70, 139,966.05 and 55,985.90 is: 83,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,310.70 : 139,966.05 = 55,985.90 : x
  2. Step 2: Convert to fraction form
    93,310.70/139,966.05 = 55,985.90/x
  3. Step 3: Cross multiply
    93,310.70x = 139,966.05 × 55,985.90
  4. Step 4: Simplify right side
    93,310.70x = 7,836,125,278.70
  5. Step 5: Solve for x
    x = 7,836,125,278.70/93,310.70
  6. Step 6: Final answer
    x = 83,978.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.