Home / 72,040.64-99,412.02-40,211.58

Finding the Fourth Proportional to 72,040.64, 99,412.02 and 40,211.58

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Solution

The fourth proportional to 72,040.64, 99,412.02 and 40,211.58 is: 55,489.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.64 : 99,412.02 = 40,211.58 : x
  2. Step 2: Convert to fraction form
    72,040.64/99,412.02 = 40,211.58/x
  3. Step 3: Cross multiply
    72,040.64x = 99,412.02 × 40,211.58
  4. Step 4: Simplify right side
    72,040.64x = 3,997,514,395.19
  5. Step 5: Solve for x
    x = 3,997,514,395.19/72,040.64
  6. Step 6: Final answer
    x = 55,489.72

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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.