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Finding the Fourth Proportional to 151,486.80, 209,027.20 and 87,812.16

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Solution

The fourth proportional to 151,486.80, 209,027.20 and 87,812.16 is: 121,166.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,486.80 : 209,027.20 = 87,812.16 : x
  2. Step 2: Convert to fraction form
    151,486.80/209,027.20 = 87,812.16/x
  3. Step 3: Cross multiply
    151,486.80x = 209,027.20 × 87,812.16
  4. Step 4: Simplify right side
    151,486.80x = 18,355,129,930.75
  5. Step 5: Solve for x
    x = 18,355,129,930.75/151,486.80
  6. Step 6: Final answer
    x = 121,166.53

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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.