Home / 78,695.11-108,600.51-42,885.15

Finding the Fourth Proportional to 78,695.11, 108,600.51 and 42,885.15

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Solution

The fourth proportional to 78,695.11, 108,600.51 and 42,885.15 is: 59,182.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.11 : 108,600.51 = 42,885.15 : x
  2. Step 2: Convert to fraction form
    78,695.11/108,600.51 = 42,885.15/x
  3. Step 3: Cross multiply
    78,695.11x = 108,600.51 × 42,885.15
  4. Step 4: Simplify right side
    78,695.11x = 4,657,349,161.43
  5. Step 5: Solve for x
    x = 4,657,349,161.43/78,695.11
  6. Step 6: Final answer
    x = 59,182.19

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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.