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Finding the Fourth Proportional to 121,787.60, 182,681.40 and 112,456.40

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Solution

The fourth proportional to 121,787.60, 182,681.40 and 112,456.40 is: 168,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,787.60 : 182,681.40 = 112,456.40 : x
  2. Step 2: Convert to fraction form
    121,787.60/182,681.40 = 112,456.40/x
  3. Step 3: Cross multiply
    121,787.60x = 182,681.40 × 112,456.40
  4. Step 4: Simplify right side
    121,787.60x = 20,543,692,590.96
  5. Step 5: Solve for x
    x = 20,543,692,590.96/121,787.60
  6. Step 6: Final answer
    x = 168,684.60

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1.5x scale

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.