Home / 80,787.77-111,500.45-61,631.36

Finding the Fourth Proportional to 80,787.77, 111,500.45 and 61,631.36

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Solution

The fourth proportional to 80,787.77, 111,500.45 and 61,631.36 is: 85,061.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.77 : 111,500.45 = 61,631.36 : x
  2. Step 2: Convert to fraction form
    80,787.77/111,500.45 = 61,631.36/x
  3. Step 3: Cross multiply
    80,787.77x = 111,500.45 × 61,631.36
  4. Step 4: Simplify right side
    80,787.77x = 6,871,924,374.11
  5. Step 5: Solve for x
    x = 6,871,924,374.11/80,787.77
  6. Step 6: Final answer
    x = 85,061.44

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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.