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Finding the Fourth Proportional to 65,648.80, 98,359.80 and 30,516.40

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Solution

The fourth proportional to 65,648.80, 98,359.80 and 30,516.40 is: 45,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,648.80 : 98,359.80 = 30,516.40 : x
  2. Step 2: Convert to fraction form
    65,648.80/98,359.80 = 30,516.40/x
  3. Step 3: Cross multiply
    65,648.80x = 98,359.80 × 30,516.40
  4. Step 4: Simplify right side
    65,648.80x = 3,001,587,000.72
  5. Step 5: Solve for x
    x = 3,001,587,000.72/65,648.80
  6. Step 6: Final answer
    x = 45,721.89

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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.