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Finding the Fourth Proportional to 98,670.76, 136,178.12 and 64,707.82

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Solution

The fourth proportional to 98,670.76, 136,178.12 and 64,707.82 is: 89,304.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,670.76 : 136,178.12 = 64,707.82 : x
  2. Step 2: Convert to fraction form
    98,670.76/136,178.12 = 64,707.82/x
  3. Step 3: Cross multiply
    98,670.76x = 136,178.12 × 64,707.82
  4. Step 4: Simplify right side
    98,670.76x = 8,811,789,276.90
  5. Step 5: Solve for x
    x = 8,811,789,276.90/98,670.76
  6. Step 6: Final answer
    x = 89,304.97

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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.