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Finding the Fourth Proportional to 71,213.60, 106,690.80 and 57,994.40

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Solution

The fourth proportional to 71,213.60, 106,690.80 and 57,994.40 is: 86,886.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,213.60 : 106,690.80 = 57,994.40 : x
  2. Step 2: Convert to fraction form
    71,213.60/106,690.80 = 57,994.40/x
  3. Step 3: Cross multiply
    71,213.60x = 106,690.80 × 57,994.40
  4. Step 4: Simplify right side
    71,213.60x = 6,187,468,931.52
  5. Step 5: Solve for x
    x = 6,187,468,931.52/71,213.60
  6. Step 6: Final answer
    x = 86,886.06

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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.