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Finding the Fourth Proportional to 85,373.74, 128,032.92 and 28,432.48

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Solution

The fourth proportional to 85,373.74, 128,032.92 and 28,432.48 is: 42,639.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373.74 : 128,032.92 = 28,432.48 : x
  2. Step 2: Convert to fraction form
    85,373.74/128,032.92 = 28,432.48/x
  3. Step 3: Cross multiply
    85,373.74x = 128,032.92 × 28,432.48
  4. Step 4: Simplify right side
    85,373.74x = 3,640,293,437.24
  5. Step 5: Solve for x
    x = 3,640,293,437.24/85,373.74
  6. Step 6: Final answer
    x = 42,639.50

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1.5x scale

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.