Home / 72,140.23-99,553.30-40,309.15

Finding the Fourth Proportional to 72,140.23, 99,553.30 and 40,309.15

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Solution

The fourth proportional to 72,140.23, 99,553.30 and 40,309.15 is: 55,626.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,140.23 : 99,553.30 = 40,309.15 : x
  2. Step 2: Convert to fraction form
    72,140.23/99,553.30 = 40,309.15/x
  3. Step 3: Cross multiply
    72,140.23x = 99,553.30 × 40,309.15
  4. Step 4: Simplify right side
    72,140.23x = 4,012,908,553.04
  5. Step 5: Solve for x
    x = 4,012,908,553.04/72,140.23
  6. Step 6: Final answer
    x = 55,626.50

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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.