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Finding the Fourth Proportional to 251,632, 347,254.59 and 138,457.18

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Solution

The fourth proportional to 251,632, 347,254.59 and 138,457.18 is: 191,072.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,632 : 347,254.59 = 138,457.18 : x
  2. Step 2: Convert to fraction form
    251,632/347,254.59 = 138,457.18/x
  3. Step 3: Cross multiply
    251,632x = 347,254.59 × 138,457.18
  4. Step 4: Simplify right side
    251,632x = 48,079,891,273.46
  5. Step 5: Solve for x
    x = 48,079,891,273.46/251,632
  6. Step 6: Final answer
    x = 191,072.25

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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.