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Finding the Fourth Proportional to 86,648.88, 129,825.45 and 47,135.46

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Solution

The fourth proportional to 86,648.88, 129,825.45 and 47,135.46 is: 70,622.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,648.88 : 129,825.45 = 47,135.46 : x
  2. Step 2: Convert to fraction form
    86,648.88/129,825.45 = 47,135.46/x
  3. Step 3: Cross multiply
    86,648.88x = 129,825.45 × 47,135.46
  4. Step 4: Simplify right side
    86,648.88x = 6,119,382,305.46
  5. Step 5: Solve for x
    x = 6,119,382,305.46/86,648.88
  6. Step 6: Final answer
    x = 70,622.75

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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.