Home / 72,140.58-99,552.12-40,309.74

Finding the Fourth Proportional to 72,140.58, 99,552.12 and 40,309.74

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Solution

The fourth proportional to 72,140.58, 99,552.12 and 40,309.74 is: 55,626.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,140.58 : 99,552.12 = 40,309.74 : x
  2. Step 2: Convert to fraction form
    72,140.58/99,552.12 = 40,309.74/x
  3. Step 3: Cross multiply
    72,140.58x = 99,552.12 × 40,309.74
  4. Step 4: Simplify right side
    72,140.58x = 4,012,920,073.65
  5. Step 5: Solve for x
    x = 4,012,920,073.65/72,140.58
  6. Step 6: Final answer
    x = 55,626.39

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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.