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Finding the Fourth Proportional to 71,994.79, 99,350.48 and 39,287.95

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Solution

The fourth proportional to 71,994.79, 99,350.48 and 39,287.95 is: 54,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994.79 : 99,350.48 = 39,287.95 : x
  2. Step 2: Convert to fraction form
    71,994.79/99,350.48 = 39,287.95/x
  3. Step 3: Cross multiply
    71,994.79x = 99,350.48 × 39,287.95
  4. Step 4: Simplify right side
    71,994.79x = 3,903,276,690.72
  5. Step 5: Solve for x
    x = 3,903,276,690.72/71,994.79
  6. Step 6: Final answer
    x = 54,216.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.