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Finding the Fourth Proportional to 67,886.10, 101,865.60 and 28,447.20

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Solution

The fourth proportional to 67,886.10, 101,865.60 and 28,447.20 is: 42,686.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,886.10 : 101,865.60 = 28,447.20 : x
  2. Step 2: Convert to fraction form
    67,886.10/101,865.60 = 28,447.20/x
  3. Step 3: Cross multiply
    67,886.10x = 101,865.60 × 28,447.20
  4. Step 4: Simplify right side
    67,886.10x = 2,897,791,096.32
  5. Step 5: Solve for x
    x = 2,897,791,096.32/67,886.10
  6. Step 6: Final answer
    x = 42,686.07

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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.