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Finding the Fourth Proportional to 261,718.93, 392,578.53 and 84,225.93

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Solution

The fourth proportional to 261,718.93, 392,578.53 and 84,225.93 is: 126,338.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,718.93 : 392,578.53 = 84,225.93 : x
  2. Step 2: Convert to fraction form
    261,718.93/392,578.53 = 84,225.93/x
  3. Step 3: Cross multiply
    261,718.93x = 392,578.53 × 84,225.93
  4. Step 4: Simplify right side
    261,718.93x = 33,065,291,787.28
  5. Step 5: Solve for x
    x = 33,065,291,787.28/261,718.93
  6. Step 6: Final answer
    x = 126,338.94

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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.