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Finding the Fourth Proportional to 91,861.40, 137,792.10 and 39,276.20

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Solution

The fourth proportional to 91,861.40, 137,792.10 and 39,276.20 is: 58,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,861.40 : 137,792.10 = 39,276.20 : x
  2. Step 2: Convert to fraction form
    91,861.40/137,792.10 = 39,276.20/x
  3. Step 3: Cross multiply
    91,861.40x = 137,792.10 × 39,276.20
  4. Step 4: Simplify right side
    91,861.40x = 5,411,950,078.02
  5. Step 5: Solve for x
    x = 5,411,950,078.02/91,861.40
  6. Step 6: Final answer
    x = 58,914.30

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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.