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Finding the Fourth Proportional to 109,710.88, 151,401.12 and 61,964.32

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Solution

The fourth proportional to 109,710.88, 151,401.12 and 61,964.32 is: 85,510.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,710.88 : 151,401.12 = 61,964.32 : x
  2. Step 2: Convert to fraction form
    109,710.88/151,401.12 = 61,964.32/x
  3. Step 3: Cross multiply
    109,710.88x = 151,401.12 × 61,964.32
  4. Step 4: Simplify right side
    109,710.88x = 9,381,467,448.04
  5. Step 5: Solve for x
    x = 9,381,467,448.04/109,710.88
  6. Step 6: Final answer
    x = 85,510.82

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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.