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Finding the Fourth Proportional to 91,990.62, 126,958.79 and 56,173.10

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Solution

The fourth proportional to 91,990.62, 126,958.79 and 56,173.10 is: 77,526.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,990.62 : 126,958.79 = 56,173.10 : x
  2. Step 2: Convert to fraction form
    91,990.62/126,958.79 = 56,173.10/x
  3. Step 3: Cross multiply
    91,990.62x = 126,958.79 × 56,173.10
  4. Step 4: Simplify right side
    91,990.62x = 7,131,668,312.19
  5. Step 5: Solve for x
    x = 7,131,668,312.19/91,990.62
  6. Step 6: Final answer
    x = 77,526.04

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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.