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Finding the Fourth Proportional to 155,925, 215,177.10 and 87,017.40

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Solution

The fourth proportional to 155,925, 215,177.10 and 87,017.40 is: 120,084.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,925 : 215,177.10 = 87,017.40 : x
  2. Step 2: Convert to fraction form
    155,925/215,177.10 = 87,017.40/x
  3. Step 3: Cross multiply
    155,925x = 215,177.10 × 87,017.40
  4. Step 4: Simplify right side
    155,925x = 18,724,151,781.54
  5. Step 5: Solve for x
    x = 18,724,151,781.54/155,925
  6. Step 6: Final answer
    x = 120,084.35

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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.