Home / 72,565.23-100,142.51-40,300.36

Finding the Fourth Proportional to 72,565.23, 100,142.51 and 40,300.36

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Solution

The fourth proportional to 72,565.23, 100,142.51 and 40,300.36 is: 55,615.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.23 : 100,142.51 = 40,300.36 : x
  2. Step 2: Convert to fraction form
    72,565.23/100,142.51 = 40,300.36/x
  3. Step 3: Cross multiply
    72,565.23x = 100,142.51 × 40,300.36
  4. Step 4: Simplify right side
    72,565.23x = 4,035,778,752.45
  5. Step 5: Solve for x
    x = 4,035,778,752.45/72,565.23
  6. Step 6: Final answer
    x = 55,615.87

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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.