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Finding the Fourth Proportional to 91,380.80, 137,071.20 and 52,014.80

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Solution

The fourth proportional to 91,380.80, 137,071.20 and 52,014.80 is: 78,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,380.80 : 137,071.20 = 52,014.80 : x
  2. Step 2: Convert to fraction form
    91,380.80/137,071.20 = 52,014.80/x
  3. Step 3: Cross multiply
    91,380.80x = 137,071.20 × 52,014.80
  4. Step 4: Simplify right side
    91,380.80x = 7,129,731,053.76
  5. Step 5: Solve for x
    x = 7,129,731,053.76/91,380.80
  6. Step 6: Final answer
    x = 78,022.20

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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.