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Finding the Fourth Proportional to 108,903.75, 163,202.40 and 86,618.22

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Solution

The fourth proportional to 108,903.75, 163,202.40 and 86,618.22 is: 129,805.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,903.75 : 163,202.40 = 86,618.22 : x
  2. Step 2: Convert to fraction form
    108,903.75/163,202.40 = 86,618.22/x
  3. Step 3: Cross multiply
    108,903.75x = 163,202.40 × 86,618.22
  4. Step 4: Simplify right side
    108,903.75x = 14,136,301,387.73
  5. Step 5: Solve for x
    x = 14,136,301,387.73/108,903.75
  6. Step 6: Final answer
    x = 129,805.46

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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.