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Finding the Fourth Proportional to 72,120.39, 99,526 and 43,456.65

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Solution

The fourth proportional to 72,120.39, 99,526 and 43,456.65 is: 59,970.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,120.39 : 99,526 = 43,456.65 : x
  2. Step 2: Convert to fraction form
    72,120.39/99,526 = 43,456.65/x
  3. Step 3: Cross multiply
    72,120.39x = 99,526 × 43,456.65
  4. Step 4: Simplify right side
    72,120.39x = 4,325,066,547.90
  5. Step 5: Solve for x
    x = 4,325,066,547.90/72,120.39
  6. Step 6: Final answer
    x = 59,970.09

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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.