Home / 78,102.20-107,781.34-42,292.24

Finding the Fourth Proportional to 78,102.20, 107,781.34 and 42,292.24

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Solution

The fourth proportional to 78,102.20, 107,781.34 and 42,292.24 is: 58,363.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,102.20 : 107,781.34 = 42,292.24 : x
  2. Step 2: Convert to fraction form
    78,102.20/107,781.34 = 42,292.24/x
  3. Step 3: Cross multiply
    78,102.20x = 107,781.34 × 42,292.24
  4. Step 4: Simplify right side
    78,102.20x = 4,558,314,298.80
  5. Step 5: Solve for x
    x = 4,558,314,298.80/78,102.20
  6. Step 6: Final answer
    x = 58,363.46

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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.