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Finding the Fourth Proportional to 91,305.60, 137,060.80 and 70,620.80

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Solution

The fourth proportional to 91,305.60, 137,060.80 and 70,620.80 is: 106,010.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,305.60 : 137,060.80 = 70,620.80 : x
  2. Step 2: Convert to fraction form
    91,305.60/137,060.80 = 70,620.80/x
  3. Step 3: Cross multiply
    91,305.60x = 137,060.80 × 70,620.80
  4. Step 4: Simplify right side
    91,305.60x = 9,679,343,344.64
  5. Step 5: Solve for x
    x = 9,679,343,344.64/91,305.60
  6. Step 6: Final answer
    x = 106,010.40

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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.