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Finding the Fourth Proportional to 125,280.60, 187,918.20 and 83,428.80

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Solution

The fourth proportional to 125,280.60, 187,918.20 and 83,428.80 is: 125,141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,280.60 : 187,918.20 = 83,428.80 : x
  2. Step 2: Convert to fraction form
    125,280.60/187,918.20 = 83,428.80/x
  3. Step 3: Cross multiply
    125,280.60x = 187,918.20 × 83,428.80
  4. Step 4: Simplify right side
    125,280.60x = 15,677,789,924.16
  5. Step 5: Solve for x
    x = 15,677,789,924.16/125,280.60
  6. Step 6: Final answer
    x = 125,141.40

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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.