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Finding the Fourth Proportional to 89,230.60, 133,582.93 and 78,158.91

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Solution

The fourth proportional to 89,230.60, 133,582.93 and 78,158.91 is: 117,008.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,230.60 : 133,582.93 = 78,158.91 : x
  2. Step 2: Convert to fraction form
    89,230.60/133,582.93 = 78,158.91/x
  3. Step 3: Cross multiply
    89,230.60x = 133,582.93 × 78,158.91
  4. Step 4: Simplify right side
    89,230.60x = 10,440,696,203.41
  5. Step 5: Solve for x
    x = 10,440,696,203.41/89,230.60
  6. Step 6: Final answer
    x = 117,008.02

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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.