Home / 78,359.04-108,136.20-42,549.36

Finding the Fourth Proportional to 78,359.04, 108,136.20 and 42,549.36

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Solution

The fourth proportional to 78,359.04, 108,136.20 and 42,549.36 is: 58,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,359.04 : 108,136.20 = 42,549.36 : x
  2. Step 2: Convert to fraction form
    78,359.04/108,136.20 = 42,549.36/x
  3. Step 3: Cross multiply
    78,359.04x = 108,136.20 × 42,549.36
  4. Step 4: Simplify right side
    78,359.04x = 4,601,126,102.83
  5. Step 5: Solve for x
    x = 4,601,126,102.83/78,359.04
  6. Step 6: Final answer
    x = 58,718.51

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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.