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Finding the Fourth Proportional to 124,709.60, 187,064.40 and 82,719.20

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Solution

The fourth proportional to 124,709.60, 187,064.40 and 82,719.20 is: 124,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,709.60 : 187,064.40 = 82,719.20 : x
  2. Step 2: Convert to fraction form
    124,709.60/187,064.40 = 82,719.20/x
  3. Step 3: Cross multiply
    124,709.60x = 187,064.40 × 82,719.20
  4. Step 4: Simplify right side
    124,709.60x = 15,473,817,516.48
  5. Step 5: Solve for x
    x = 15,473,817,516.48/124,709.60
  6. Step 6: Final answer
    x = 124,078.80

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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.