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Finding the Fourth Proportional to 98,777.32, 136,312.42 and 54,065

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Solution

The fourth proportional to 98,777.32, 136,312.42 and 54,065 is: 74,609.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,777.32 : 136,312.42 = 54,065 : x
  2. Step 2: Convert to fraction form
    98,777.32/136,312.42 = 54,065/x
  3. Step 3: Cross multiply
    98,777.32x = 136,312.42 × 54,065
  4. Step 4: Simplify right side
    98,777.32x = 7,369,730,987.30
  5. Step 5: Solve for x
    x = 7,369,730,987.30/98,777.32
  6. Step 6: Final answer
    x = 74,609.55

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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.