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Finding the Fourth Proportional to 155,980.62, 215,255.07 and 88,000.83

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Solution

The fourth proportional to 155,980.62, 215,255.07 and 88,000.83 is: 121,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,980.62 : 215,255.07 = 88,000.83 : x
  2. Step 2: Convert to fraction form
    155,980.62/215,255.07 = 88,000.83/x
  3. Step 3: Cross multiply
    155,980.62x = 215,255.07 × 88,000.83
  4. Step 4: Simplify right side
    155,980.62x = 18,942,624,821.71
  5. Step 5: Solve for x
    x = 18,942,624,821.71/155,980.62
  6. Step 6: Final answer
    x = 121,442.17

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1.5x scale

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.