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Finding the Fourth Proportional to 121,762.69, 182,644.08 and 79,678.18

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Solution

The fourth proportional to 121,762.69, 182,644.08 and 79,678.18 is: 119,517.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,762.69 : 182,644.08 = 79,678.18 : x
  2. Step 2: Convert to fraction form
    121,762.69/182,644.08 = 79,678.18/x
  3. Step 3: Cross multiply
    121,762.69x = 182,644.08 × 79,678.18
  4. Step 4: Simplify right side
    121,762.69x = 14,552,747,882.17
  5. Step 5: Solve for x
    x = 14,552,747,882.17/121,762.69
  6. Step 6: Final answer
    x = 119,517.30

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1.5x scale

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.