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Finding the Fourth Proportional to 138,870.60, 208,014.30 and 76,468.20

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Solution

The fourth proportional to 138,870.60, 208,014.30 and 76,468.20 is: 114,541.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870.60 : 208,014.30 = 76,468.20 : x
  2. Step 2: Convert to fraction form
    138,870.60/208,014.30 = 76,468.20/x
  3. Step 3: Cross multiply
    138,870.60x = 208,014.30 × 76,468.20
  4. Step 4: Simplify right side
    138,870.60x = 15,906,479,095.26
  5. Step 5: Solve for x
    x = 15,906,479,095.26/138,870.60
  6. Step 6: Final answer
    x = 114,541.73

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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.