Home / 90,764.64-136,147.02-28,440

Finding the Fourth Proportional to 90,764.64, 136,147.02 and 28,440

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Solution

The fourth proportional to 90,764.64, 136,147.02 and 28,440 is: 42,660.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,764.64 : 136,147.02 = 28,440 : x
  2. Step 2: Convert to fraction form
    90,764.64/136,147.02 = 28,440/x
  3. Step 3: Cross multiply
    90,764.64x = 136,147.02 × 28,440
  4. Step 4: Simplify right side
    90,764.64x = 3,872,021,248.80
  5. Step 5: Solve for x
    x = 3,872,021,248.80/90,764.64
  6. Step 6: Final answer
    x = 42,660.02

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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.