Home / 78,440.20-108,248.16-42,630.23

Finding the Fourth Proportional to 78,440.20, 108,248.16 and 42,630.23

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Solution

The fourth proportional to 78,440.20, 108,248.16 and 42,630.23 is: 58,830.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.20 : 108,248.16 = 42,630.23 : x
  2. Step 2: Convert to fraction form
    78,440.20/108,248.16 = 42,630.23/x
  3. Step 3: Cross multiply
    78,440.20x = 108,248.16 × 42,630.23
  4. Step 4: Simplify right side
    78,440.20x = 4,614,644,388.36
  5. Step 5: Solve for x
    x = 4,614,644,388.36/78,440.20
  6. Step 6: Final answer
    x = 58,830.10

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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.