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Finding the Fourth Proportional to 261,969.30, 392,953.95 and 122,001.30

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Solution

The fourth proportional to 261,969.30, 392,953.95 and 122,001.30 is: 183,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,969.30 : 392,953.95 = 122,001.30 : x
  2. Step 2: Convert to fraction form
    261,969.30/392,953.95 = 122,001.30/x
  3. Step 3: Cross multiply
    261,969.30x = 392,953.95 × 122,001.30
  4. Step 4: Simplify right side
    261,969.30x = 47,940,892,740.14
  5. Step 5: Solve for x
    x = 47,940,892,740.14/261,969.30
  6. Step 6: Final answer
    x = 183,001.95

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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.