Home / 99,785.12-137,703.28-55,073.12

Finding the Fourth Proportional to 99,785.12, 137,703.28 and 55,073.12

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Solution

The fourth proportional to 99,785.12, 137,703.28 and 55,073.12 is: 76,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,785.12 : 137,703.28 = 55,073.12 : x
  2. Step 2: Convert to fraction form
    99,785.12/137,703.28 = 55,073.12/x
  3. Step 3: Cross multiply
    99,785.12x = 137,703.28 × 55,073.12
  4. Step 4: Simplify right side
    99,785.12x = 7,583,749,263.83
  5. Step 5: Solve for x
    x = 7,583,749,263.83/99,785.12
  6. Step 6: Final answer
    x = 76,000.80

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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.