Home / 98,720.55-136,234.21-53,398.57

Finding the Fourth Proportional to 98,720.55, 136,234.21 and 53,398.57

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Solution

The fourth proportional to 98,720.55, 136,234.21 and 53,398.57 is: 73,689.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,720.55 : 136,234.21 = 53,398.57 : x
  2. Step 2: Convert to fraction form
    98,720.55/136,234.21 = 53,398.57/x
  3. Step 3: Cross multiply
    98,720.55x = 136,234.21 × 53,398.57
  4. Step 4: Simplify right side
    98,720.55x = 7,274,711,534.95
  5. Step 5: Solve for x
    x = 7,274,711,534.95/98,720.55
  6. Step 6: Final answer
    x = 73,689.94

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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.