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Finding the Fourth Proportional to 92,861.37, 128,151.32 and 54,623.70

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Solution

The fourth proportional to 92,861.37, 128,151.32 and 54,623.70 is: 75,382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,861.37 : 128,151.32 = 54,623.70 : x
  2. Step 2: Convert to fraction form
    92,861.37/128,151.32 = 54,623.70/x
  3. Step 3: Cross multiply
    92,861.37x = 128,151.32 × 54,623.70
  4. Step 4: Simplify right side
    92,861.37x = 7,000,098,985.17
  5. Step 5: Solve for x
    x = 7,000,098,985.17/92,861.37
  6. Step 6: Final answer
    x = 75,382.25

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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.