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Finding the Fourth Proportional to 86,550.60, 129,825.90 and 47,087.40

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Solution

The fourth proportional to 86,550.60, 129,825.90 and 47,087.40 is: 70,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,550.60 : 129,825.90 = 47,087.40 : x
  2. Step 2: Convert to fraction form
    86,550.60/129,825.90 = 47,087.40/x
  3. Step 3: Cross multiply
    86,550.60x = 129,825.90 × 47,087.40
  4. Step 4: Simplify right side
    86,550.60x = 6,113,164,083.66
  5. Step 5: Solve for x
    x = 6,113,164,083.66/86,550.60
  6. Step 6: Final answer
    x = 70,631.10

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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.