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Finding the Fourth Proportional to 72,774.65, 100,417.32 and 40,503.65

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Solution

The fourth proportional to 72,774.65, 100,417.32 and 40,503.65 is: 55,888.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,774.65 : 100,417.32 = 40,503.65 : x
  2. Step 2: Convert to fraction form
    72,774.65/100,417.32 = 40,503.65/x
  3. Step 3: Cross multiply
    72,774.65x = 100,417.32 × 40,503.65
  4. Step 4: Simplify right side
    72,774.65x = 4,067,267,481.13
  5. Step 5: Solve for x
    x = 4,067,267,481.13/72,774.65
  6. Step 6: Final answer
    x = 55,888.52

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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.