Home / 78,435.18-108,240.42-42,625.11

Finding the Fourth Proportional to 78,435.18, 108,240.42 and 42,625.11

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Solution

The fourth proportional to 78,435.18, 108,240.42 and 42,625.11 is: 58,822.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,435.18 : 108,240.42 = 42,625.11 : x
  2. Step 2: Convert to fraction form
    78,435.18/108,240.42 = 42,625.11/x
  3. Step 3: Cross multiply
    78,435.18x = 108,240.42 × 42,625.11
  4. Step 4: Simplify right side
    78,435.18x = 4,613,759,808.95
  5. Step 5: Solve for x
    x = 4,613,759,808.95/78,435.18
  6. Step 6: Final answer
    x = 58,822.58

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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.