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Finding the Fourth Proportional to 261,881.25, 392,844.50 and 72,341.55

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Solution

The fourth proportional to 261,881.25, 392,844.50 and 72,341.55 is: 108,518.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,881.25 : 392,844.50 = 72,341.55 : x
  2. Step 2: Convert to fraction form
    261,881.25/392,844.50 = 72,341.55/x
  3. Step 3: Cross multiply
    261,881.25x = 392,844.50 × 72,341.55
  4. Step 4: Simplify right side
    261,881.25x = 28,418,980,038.98
  5. Step 5: Solve for x
    x = 28,418,980,038.98/261,881.25
  6. Step 6: Final answer
    x = 108,518.57

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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.