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Finding the Fourth Proportional to 65,854.80, 98,668.80 and 30,722.40

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Solution

The fourth proportional to 65,854.80, 98,668.80 and 30,722.40 is: 46,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,854.80 : 98,668.80 = 30,722.40 : x
  2. Step 2: Convert to fraction form
    65,854.80/98,668.80 = 30,722.40/x
  3. Step 3: Cross multiply
    65,854.80x = 98,668.80 × 30,722.40
  4. Step 4: Simplify right side
    65,854.80x = 3,031,342,341.12
  5. Step 5: Solve for x
    x = 3,031,342,341.12/65,854.80
  6. Step 6: Final answer
    x = 46,030.70

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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.