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Finding the Fourth Proportional to 108,781.60, 150,118.48 and 63,490.72

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Solution

The fourth proportional to 108,781.60, 150,118.48 and 63,490.72 is: 87,617.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,781.60 : 150,118.48 = 63,490.72 : x
  2. Step 2: Convert to fraction form
    108,781.60/150,118.48 = 63,490.72/x
  3. Step 3: Cross multiply
    108,781.60x = 150,118.48 × 63,490.72
  4. Step 4: Simplify right side
    108,781.60x = 9,531,130,380.51
  5. Step 5: Solve for x
    x = 9,531,130,380.51/108,781.60
  6. Step 6: Final answer
    x = 87,617.12

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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.