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Finding the Fourth Proportional to 75,686.88, 104,447.90 and 42,152.88

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Solution

The fourth proportional to 75,686.88, 104,447.90 and 42,152.88 is: 58,170.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,686.88 : 104,447.90 = 42,152.88 : x
  2. Step 2: Convert to fraction form
    75,686.88/104,447.90 = 42,152.88/x
  3. Step 3: Cross multiply
    75,686.88x = 104,447.90 × 42,152.88
  4. Step 4: Simplify right side
    75,686.88x = 4,402,779,794.95
  5. Step 5: Solve for x
    x = 4,402,779,794.95/75,686.88
  6. Step 6: Final answer
    x = 58,170.98

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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.