Home / 72,040.78-99,407.10-40,211.02

Finding the Fourth Proportional to 72,040.78, 99,407.10 and 40,211.02

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Solution

The fourth proportional to 72,040.78, 99,407.10 and 40,211.02 is: 55,486.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.78 : 99,407.10 = 40,211.02 : x
  2. Step 2: Convert to fraction form
    72,040.78/99,407.10 = 40,211.02/x
  3. Step 3: Cross multiply
    72,040.78x = 99,407.10 × 40,211.02
  4. Step 4: Simplify right side
    72,040.78x = 3,997,260,637.72
  5. Step 5: Solve for x
    x = 3,997,260,637.72/72,040.78
  6. Step 6: Final answer
    x = 55,486.08

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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.