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Finding the Fourth Proportional to 125,358.28, 172,980.36 and 74,352.64

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Solution

The fourth proportional to 125,358.28, 172,980.36 and 74,352.64 is: 102,598.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,358.28 : 172,980.36 = 74,352.64 : x
  2. Step 2: Convert to fraction form
    125,358.28/172,980.36 = 74,352.64/x
  3. Step 3: Cross multiply
    125,358.28x = 172,980.36 × 74,352.64
  4. Step 4: Simplify right side
    125,358.28x = 12,861,546,434.15
  5. Step 5: Solve for x
    x = 12,861,546,434.15/125,358.28
  6. Step 6: Final answer
    x = 102,598.30

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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.