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Finding the Fourth Proportional to 86,207.60, 129,311.40 and 56,658.80

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Solution

The fourth proportional to 86,207.60, 129,311.40 and 56,658.80 is: 84,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,207.60 : 129,311.40 = 56,658.80 : x
  2. Step 2: Convert to fraction form
    86,207.60/129,311.40 = 56,658.80/x
  3. Step 3: Cross multiply
    86,207.60x = 129,311.40 × 56,658.80
  4. Step 4: Simplify right side
    86,207.60x = 7,326,628,750.32
  5. Step 5: Solve for x
    x = 7,326,628,750.32/86,207.60
  6. Step 6: Final answer
    x = 84,988.20

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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.