Home / 72,031.08-99,407.88-40,206.18

Finding the Fourth Proportional to 72,031.08, 99,407.88 and 40,206.18

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Solution

The fourth proportional to 72,031.08, 99,407.88 and 40,206.18 is: 55,487.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,031.08 : 99,407.88 = 40,206.18 : x
  2. Step 2: Convert to fraction form
    72,031.08/99,407.88 = 40,206.18/x
  3. Step 3: Cross multiply
    72,031.08x = 99,407.88 × 40,206.18
  4. Step 4: Simplify right side
    72,031.08x = 3,996,811,116.70
  5. Step 5: Solve for x
    x = 3,996,811,116.70/72,031.08
  6. Step 6: Final answer
    x = 55,487.31

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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.