Home / 78,118.18-117,140.46-28,191.76

Finding the Fourth Proportional to 78,118.18, 117,140.46 and 28,191.76

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Solution

The fourth proportional to 78,118.18, 117,140.46 and 28,191.76 is: 42,274.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.18 : 117,140.46 = 28,191.76 : x
  2. Step 2: Convert to fraction form
    78,118.18/117,140.46 = 28,191.76/x
  3. Step 3: Cross multiply
    78,118.18x = 117,140.46 × 28,191.76
  4. Step 4: Simplify right side
    78,118.18x = 3,302,395,734.61
  5. Step 5: Solve for x
    x = 3,302,395,734.61/78,118.18
  6. Step 6: Final answer
    x = 42,274.36

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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.