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Finding the Fourth Proportional to 91,988.79, 126,949.05 and 56,173.02

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Solution

The fourth proportional to 91,988.79, 126,949.05 and 56,173.02 is: 77,521.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,988.79 : 126,949.05 = 56,173.02 : x
  2. Step 2: Convert to fraction form
    91,988.79/126,949.05 = 56,173.02/x
  3. Step 3: Cross multiply
    91,988.79x = 126,949.05 × 56,173.02
  4. Step 4: Simplify right side
    91,988.79x = 7,131,111,524.63
  5. Step 5: Solve for x
    x = 7,131,111,524.63/91,988.79
  6. Step 6: Final answer
    x = 77,521.53

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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.