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Finding the Fourth Proportional to 221,666.47, 332,570.54 and 79,415.71

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Solution

The fourth proportional to 221,666.47, 332,570.54 and 79,415.71 is: 119,148.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,666.47 : 332,570.54 = 79,415.71 : x
  2. Step 2: Convert to fraction form
    221,666.47/332,570.54 = 79,415.71/x
  3. Step 3: Cross multiply
    221,666.47x = 332,570.54 × 79,415.71
  4. Step 4: Simplify right side
    221,666.47x = 26,411,325,162.10
  5. Step 5: Solve for x
    x = 26,411,325,162.10/221,666.47
  6. Step 6: Final answer
    x = 119,148.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.