Home / 72,564.40-100,139.06-40,299.04

Finding the Fourth Proportional to 72,564.40, 100,139.06 and 40,299.04

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Solution

The fourth proportional to 72,564.40, 100,139.06 and 40,299.04 is: 55,612.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,564.40 : 100,139.06 = 40,299.04 : x
  2. Step 2: Convert to fraction form
    72,564.40/100,139.06 = 40,299.04/x
  3. Step 3: Cross multiply
    72,564.40x = 100,139.06 × 40,299.04
  4. Step 4: Simplify right side
    72,564.40x = 4,035,507,984.50
  5. Step 5: Solve for x
    x = 4,035,507,984.50/72,564.40
  6. Step 6: Final answer
    x = 55,612.78

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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.