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Finding the Fourth Proportional to 65,115.34, 89,876.71 and 38,275.84

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Solution

The fourth proportional to 65,115.34, 89,876.71 and 38,275.84 is: 52,830.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,115.34 : 89,876.71 = 38,275.84 : x
  2. Step 2: Convert to fraction form
    65,115.34/89,876.71 = 38,275.84/x
  3. Step 3: Cross multiply
    65,115.34x = 89,876.71 × 38,275.84
  4. Step 4: Simplify right side
    65,115.34x = 3,440,106,571.69
  5. Step 5: Solve for x
    x = 3,440,106,571.69/65,115.34
  6. Step 6: Final answer
    x = 52,830.97

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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.