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Finding the Fourth Proportional to 261,669.39, 392,504.49 and 74,680.89

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Solution

The fourth proportional to 261,669.39, 392,504.49 and 74,680.89 is: 112,021.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,669.39 : 392,504.49 = 74,680.89 : x
  2. Step 2: Convert to fraction form
    261,669.39/392,504.49 = 74,680.89/x
  3. Step 3: Cross multiply
    261,669.39x = 392,504.49 × 74,680.89
  4. Step 4: Simplify right side
    261,669.39x = 29,312,584,642.20
  5. Step 5: Solve for x
    x = 29,312,584,642.20/261,669.39
  6. Step 6: Final answer
    x = 112,021.45

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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.