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Finding the Fourth Proportional to 64,876.40, 89,530.08 and 38,034.80

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Solution

The fourth proportional to 64,876.40, 89,530.08 and 38,034.80 is: 52,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,876.40 : 89,530.08 = 38,034.80 : x
  2. Step 2: Convert to fraction form
    64,876.40/89,530.08 = 38,034.80/x
  3. Step 3: Cross multiply
    64,876.40x = 89,530.08 × 38,034.80
  4. Step 4: Simplify right side
    64,876.40x = 3,405,258,686.78
  5. Step 5: Solve for x
    x = 3,405,258,686.78/64,876.40
  6. Step 6: Final answer
    x = 52,488.40

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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.