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Finding the Fourth Proportional to 128,046.95, 176,721.50 and 71,470.07

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Solution

The fourth proportional to 128,046.95, 176,721.50 and 71,470.07 is: 98,638.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,046.95 : 176,721.50 = 71,470.07 : x
  2. Step 2: Convert to fraction form
    128,046.95/176,721.50 = 71,470.07/x
  3. Step 3: Cross multiply
    128,046.95x = 176,721.50 × 71,470.07
  4. Step 4: Simplify right side
    128,046.95x = 12,630,297,270.57
  5. Step 5: Solve for x
    x = 12,630,297,270.57/128,046.95
  6. Step 6: Final answer
    x = 98,638.02

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1.5x scale

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.