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Finding the Fourth Proportional to 151,479.60, 209,057.40 and 91,069.92

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Solution

The fourth proportional to 151,479.60, 209,057.40 and 91,069.92 is: 125,685.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,479.60 : 209,057.40 = 91,069.92 : x
  2. Step 2: Convert to fraction form
    151,479.60/209,057.40 = 91,069.92/x
  3. Step 3: Cross multiply
    151,479.60x = 209,057.40 × 91,069.92
  4. Step 4: Simplify right side
    151,479.60x = 19,038,840,693.41
  5. Step 5: Solve for x
    x = 19,038,840,693.41/151,479.60
  6. Step 6: Final answer
    x = 125,685.84

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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.