Home / 99,507.20-137,343.36-61,809.92

Finding the Fourth Proportional to 99,507.20, 137,343.36 and 61,809.92

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Solution

The fourth proportional to 99,507.20, 137,343.36 and 61,809.92 is: 85,312.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,507.20 : 137,343.36 = 61,809.92 : x
  2. Step 2: Convert to fraction form
    99,507.20/137,343.36 = 61,809.92/x
  3. Step 3: Cross multiply
    99,507.20x = 137,343.36 × 61,809.92
  4. Step 4: Simplify right side
    99,507.20x = 8,489,182,094.13
  5. Step 5: Solve for x
    x = 8,489,182,094.13/99,507.20
  6. Step 6: Final answer
    x = 85,312.24

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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.