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Finding the Fourth Proportional to 89,607.70, 134,484.45 and 86,691.70

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Solution

The fourth proportional to 89,607.70, 134,484.45 and 86,691.70 is: 130,108.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,607.70 : 134,484.45 = 86,691.70 : x
  2. Step 2: Convert to fraction form
    89,607.70/134,484.45 = 86,691.70/x
  3. Step 3: Cross multiply
    89,607.70x = 134,484.45 × 86,691.70
  4. Step 4: Simplify right side
    89,607.70x = 11,658,685,594.07
  5. Step 5: Solve for x
    x = 11,658,685,594.07/89,607.70
  6. Step 6: Final answer
    x = 130,108.08

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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.