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Finding the Fourth Proportional to 77,630.04, 107,020.98 and 65,645.28

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Solution

The fourth proportional to 77,630.04, 107,020.98 and 65,645.28 is: 90,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,630.04 : 107,020.98 = 65,645.28 : x
  2. Step 2: Convert to fraction form
    77,630.04/107,020.98 = 65,645.28/x
  3. Step 3: Cross multiply
    77,630.04x = 107,020.98 × 65,645.28
  4. Step 4: Simplify right side
    77,630.04x = 7,025,422,197.97
  5. Step 5: Solve for x
    x = 7,025,422,197.97/77,630.04
  6. Step 6: Final answer
    x = 90,498.76

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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.