Home / 78,140.75-107,833.80-42,331.46

Finding the Fourth Proportional to 78,140.75, 107,833.80 and 42,331.46

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Solution

The fourth proportional to 78,140.75, 107,833.80 and 42,331.46 is: 58,417.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.75 : 107,833.80 = 42,331.46 : x
  2. Step 2: Convert to fraction form
    78,140.75/107,833.80 = 42,331.46/x
  3. Step 3: Cross multiply
    78,140.75x = 107,833.80 × 42,331.46
  4. Step 4: Simplify right side
    78,140.75x = 4,564,762,135.93
  5. Step 5: Solve for x
    x = 4,564,762,135.93/78,140.75
  6. Step 6: Final answer
    x = 58,417.18

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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.