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Finding the Fourth Proportional to 261,405.60, 392,100.30 and 74,417.10

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Solution

The fourth proportional to 261,405.60, 392,100.30 and 74,417.10 is: 111,623.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,405.60 : 392,100.30 = 74,417.10 : x
  2. Step 2: Convert to fraction form
    261,405.60/392,100.30 = 74,417.10/x
  3. Step 3: Cross multiply
    261,405.60x = 392,100.30 × 74,417.10
  4. Step 4: Simplify right side
    261,405.60x = 29,178,967,235.13
  5. Step 5: Solve for x
    x = 29,178,967,235.13/261,405.60
  6. Step 6: Final answer
    x = 111,623.34

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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.