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Finding the Fourth Proportional to 91,307.88, 125,981.84 and 53,574.84

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Solution

The fourth proportional to 91,307.88, 125,981.84 and 53,574.84 is: 73,919.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,307.88 : 125,981.84 = 53,574.84 : x
  2. Step 2: Convert to fraction form
    91,307.88/125,981.84 = 53,574.84/x
  3. Step 3: Cross multiply
    91,307.88x = 125,981.84 × 53,574.84
  4. Step 4: Simplify right side
    91,307.88x = 6,749,456,920.91
  5. Step 5: Solve for x
    x = 6,749,456,920.91/91,307.88
  6. Step 6: Final answer
    x = 73,919.76

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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.