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Finding the Fourth Proportional to 160,557.84, 240,766.92 and 85,661.28

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Solution

The fourth proportional to 160,557.84, 240,766.92 and 85,661.28 is: 128,454.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,557.84 : 240,766.92 = 85,661.28 : x
  2. Step 2: Convert to fraction form
    160,557.84/240,766.92 = 85,661.28/x
  3. Step 3: Cross multiply
    160,557.84x = 240,766.92 × 85,661.28
  4. Step 4: Simplify right side
    160,557.84x = 20,624,402,548.86
  5. Step 5: Solve for x
    x = 20,624,402,548.86/160,557.84
  6. Step 6: Final answer
    x = 128,454.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.