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Finding the Fourth Proportional to 101,587.68, 140,060.88 and 78,888.24

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Solution

The fourth proportional to 101,587.68, 140,060.88 and 78,888.24 is: 108,764.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,587.68 : 140,060.88 = 78,888.24 : x
  2. Step 2: Convert to fraction form
    101,587.68/140,060.88 = 78,888.24/x
  3. Step 3: Cross multiply
    101,587.68x = 140,060.88 × 78,888.24
  4. Step 4: Simplify right side
    101,587.68x = 11,049,156,316.05
  5. Step 5: Solve for x
    x = 11,049,156,316.05/101,587.68
  6. Step 6: Final answer
    x = 108,764.73

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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.