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Finding the Fourth Proportional to 99,381.77, 137,150.45 and 56,948.50

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Solution

The fourth proportional to 99,381.77, 137,150.45 and 56,948.50 is: 78,591.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,381.77 : 137,150.45 = 56,948.50 : x
  2. Step 2: Convert to fraction form
    99,381.77/137,150.45 = 56,948.50/x
  3. Step 3: Cross multiply
    99,381.77x = 137,150.45 × 56,948.50
  4. Step 4: Simplify right side
    99,381.77x = 7,810,512,502.08
  5. Step 5: Solve for x
    x = 7,810,512,502.08/99,381.77
  6. Step 6: Final answer
    x = 78,591.00

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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.