Home / 72,148.80-99,565.11-40,317.69

Finding the Fourth Proportional to 72,148.80, 99,565.11 and 40,317.69

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Solution

The fourth proportional to 72,148.80, 99,565.11 and 40,317.69 is: 55,638.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,148.80 : 99,565.11 = 40,317.69 : x
  2. Step 2: Convert to fraction form
    72,148.80/99,565.11 = 40,317.69/x
  3. Step 3: Cross multiply
    72,148.80x = 99,565.11 × 40,317.69
  4. Step 4: Simplify right side
    72,148.80x = 4,014,235,239.80
  5. Step 5: Solve for x
    x = 4,014,235,239.80/72,148.80
  6. Step 6: Final answer
    x = 55,638.28

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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.