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Finding the Fourth Proportional to 98,671.76, 136,179.50 and 64,708.82

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Solution

The fourth proportional to 98,671.76, 136,179.50 and 64,708.82 is: 89,306.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,671.76 : 136,179.50 = 64,708.82 : x
  2. Step 2: Convert to fraction form
    98,671.76/136,179.50 = 64,708.82/x
  3. Step 3: Cross multiply
    98,671.76x = 136,179.50 × 64,708.82
  4. Step 4: Simplify right side
    98,671.76x = 8,812,014,753.19
  5. Step 5: Solve for x
    x = 8,812,014,753.19/98,671.76
  6. Step 6: Final answer
    x = 89,306.35

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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.