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Finding the Fourth Proportional to 151,387.48, 208,914.78 and 87,762.16

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Solution

The fourth proportional to 151,387.48, 208,914.78 and 87,762.16 is: 121,111.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,387.48 : 208,914.78 = 87,762.16 : x
  2. Step 2: Convert to fraction form
    151,387.48/208,914.78 = 87,762.16/x
  3. Step 3: Cross multiply
    151,387.48x = 208,914.78 × 87,762.16
  4. Step 4: Simplify right side
    151,387.48x = 18,334,812,348.72
  5. Step 5: Solve for x
    x = 18,334,812,348.72/151,387.48
  6. Step 6: Final answer
    x = 121,111.81

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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.