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Finding the Fourth Proportional to 83,485.80, 115,215.10 and 49,514.40

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Solution

The fourth proportional to 83,485.80, 115,215.10 and 49,514.40 is: 68,332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,485.80 : 115,215.10 = 49,514.40 : x
  2. Step 2: Convert to fraction form
    83,485.80/115,215.10 = 49,514.40/x
  3. Step 3: Cross multiply
    83,485.80x = 115,215.10 × 49,514.40
  4. Step 4: Simplify right side
    83,485.80x = 5,704,806,547.44
  5. Step 5: Solve for x
    x = 5,704,806,547.44/83,485.80
  6. Step 6: Final answer
    x = 68,332.66

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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.