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Finding the Fourth Proportional to 86,656.60, 129,984.90 and 70,910.20

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Solution

The fourth proportional to 86,656.60, 129,984.90 and 70,910.20 is: 106,365.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,656.60 : 129,984.90 = 70,910.20 : x
  2. Step 2: Convert to fraction form
    86,656.60/129,984.90 = 70,910.20/x
  3. Step 3: Cross multiply
    86,656.60x = 129,984.90 × 70,910.20
  4. Step 4: Simplify right side
    86,656.60x = 9,217,255,255.98
  5. Step 5: Solve for x
    x = 9,217,255,255.98/86,656.60
  6. Step 6: Final answer
    x = 106,365.30

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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.