Home / 120,718.60-181,077.90-31,985.80

Finding the Fourth Proportional to 120,718.60, 181,077.90 and 31,985.80

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Solution

The fourth proportional to 120,718.60, 181,077.90 and 31,985.80 is: 47,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,718.60 : 181,077.90 = 31,985.80 : x
  2. Step 2: Convert to fraction form
    120,718.60/181,077.90 = 31,985.80/x
  3. Step 3: Cross multiply
    120,718.60x = 181,077.90 × 31,985.80
  4. Step 4: Simplify right side
    120,718.60x = 5,791,921,493.82
  5. Step 5: Solve for x
    x = 5,791,921,493.82/120,718.60
  6. Step 6: Final answer
    x = 47,978.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.