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Finding the Fourth Proportional to 91,247.94, 126,001.42 and 57,315.42

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Solution

The fourth proportional to 91,247.94, 126,001.42 and 57,315.42 is: 79,145.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,247.94 : 126,001.42 = 57,315.42 : x
  2. Step 2: Convert to fraction form
    91,247.94/126,001.42 = 57,315.42/x
  3. Step 3: Cross multiply
    91,247.94x = 126,001.42 × 57,315.42
  4. Step 4: Simplify right side
    91,247.94x = 7,221,824,307.90
  5. Step 5: Solve for x
    x = 7,221,824,307.90/91,247.94
  6. Step 6: Final answer
    x = 79,145.07

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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.