Home / 72,372.12-99,879.75-40,547.58

Finding the Fourth Proportional to 72,372.12, 99,879.75 and 40,547.58

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Solution

The fourth proportional to 72,372.12, 99,879.75 and 40,547.58 is: 55,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,372.12 : 99,879.75 = 40,547.58 : x
  2. Step 2: Convert to fraction form
    72,372.12/99,879.75 = 40,547.58/x
  3. Step 3: Cross multiply
    72,372.12x = 99,879.75 × 40,547.58
  4. Step 4: Simplify right side
    72,372.12x = 4,049,882,153.51
  5. Step 5: Solve for x
    x = 4,049,882,153.51/72,372.12
  6. Step 6: Final answer
    x = 55,959.15

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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.