Home / 91,170.45-136,306.08-77,285.43

Finding the Fourth Proportional to 91,170.45, 136,306.08 and 77,285.43

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Solution

The fourth proportional to 91,170.45, 136,306.08 and 77,285.43 is: 115,547.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,170.45 : 136,306.08 = 77,285.43 : x
  2. Step 2: Convert to fraction form
    91,170.45/136,306.08 = 77,285.43/x
  3. Step 3: Cross multiply
    91,170.45x = 136,306.08 × 77,285.43
  4. Step 4: Simplify right side
    91,170.45x = 10,534,474,004.41
  5. Step 5: Solve for x
    x = 10,534,474,004.41/91,170.45
  6. Step 6: Final answer
    x = 115,547.02

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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.