Home / 72,043.20-99,419.04-40,211.10

Finding the Fourth Proportional to 72,043.20, 99,419.04 and 40,211.10

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Solution

The fourth proportional to 72,043.20, 99,419.04 and 40,211.10 is: 55,491.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,043.20 : 99,419.04 = 40,211.10 : x
  2. Step 2: Convert to fraction form
    72,043.20/99,419.04 = 40,211.10/x
  3. Step 3: Cross multiply
    72,043.20x = 99,419.04 × 40,211.10
  4. Step 4: Simplify right side
    72,043.20x = 3,997,748,959.34
  5. Step 5: Solve for x
    x = 3,997,748,959.34/72,043.20
  6. Step 6: Final answer
    x = 55,491.00

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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.