Home / 72,138.54-99,550.97-40,307.46

Finding the Fourth Proportional to 72,138.54, 99,550.97 and 40,307.46

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Solution

The fourth proportional to 72,138.54, 99,550.97 and 40,307.46 is: 55,624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.54 : 99,550.97 = 40,307.46 : x
  2. Step 2: Convert to fraction form
    72,138.54/99,550.97 = 40,307.46/x
  3. Step 3: Cross multiply
    72,138.54x = 99,550.97 × 40,307.46
  4. Step 4: Simplify right side
    72,138.54x = 4,012,646,635.31
  5. Step 5: Solve for x
    x = 4,012,646,635.31/72,138.54
  6. Step 6: Final answer
    x = 55,624.18

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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.