Home / 138,670.02-207,596.79-85,909.86

Finding the Fourth Proportional to 138,670.02, 207,596.79 and 85,909.86

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Solution

The fourth proportional to 138,670.02, 207,596.79 and 85,909.86 is: 128,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,670.02 : 207,596.79 = 85,909.86 : x
  2. Step 2: Convert to fraction form
    138,670.02/207,596.79 = 85,909.86/x
  3. Step 3: Cross multiply
    138,670.02x = 207,596.79 × 85,909.86
  4. Step 4: Simplify right side
    138,670.02x = 17,834,611,165.35
  5. Step 5: Solve for x
    x = 17,834,611,165.35/138,670.02
  6. Step 6: Final answer
    x = 128,611.87

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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.