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Finding the Fourth Proportional to 251,668.80, 347,302.71 and 138,491.55

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Solution

The fourth proportional to 251,668.80, 347,302.71 and 138,491.55 is: 191,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,668.80 : 347,302.71 = 138,491.55 : x
  2. Step 2: Convert to fraction form
    251,668.80/347,302.71 = 138,491.55/x
  3. Step 3: Cross multiply
    251,668.80x = 347,302.71 × 138,491.55
  4. Step 4: Simplify right side
    251,668.80x = 48,098,490,627.10
  5. Step 5: Solve for x
    x = 48,098,490,627.10/251,668.80
  6. Step 6: Final answer
    x = 191,118.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.