Home / 78,990.06-109,008.36-47,177.30

Finding the Fourth Proportional to 78,990.06, 109,008.36 and 47,177.30

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Solution

The fourth proportional to 78,990.06, 109,008.36 and 47,177.30 is: 65,105.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.06 : 109,008.36 = 47,177.30 : x
  2. Step 2: Convert to fraction form
    78,990.06/109,008.36 = 47,177.30/x
  3. Step 3: Cross multiply
    78,990.06x = 109,008.36 × 47,177.30
  4. Step 4: Simplify right side
    78,990.06x = 5,142,720,102.23
  5. Step 5: Solve for x
    x = 5,142,720,102.23/78,990.06
  6. Step 6: Final answer
    x = 65,105.91

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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.