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Finding the Fourth Proportional to 261,421.04, 392,094.48 and 83,905.08

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Solution

The fourth proportional to 261,421.04, 392,094.48 and 83,905.08 is: 125,845.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,421.04 : 392,094.48 = 83,905.08 : x
  2. Step 2: Convert to fraction form
    261,421.04/392,094.48 = 83,905.08/x
  3. Step 3: Cross multiply
    261,421.04x = 392,094.48 × 83,905.08
  4. Step 4: Simplify right side
    261,421.04x = 32,898,718,711.96
  5. Step 5: Solve for x
    x = 32,898,718,711.96/261,421.04
  6. Step 6: Final answer
    x = 125,845.72

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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.