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Finding the Fourth Proportional to 108,806.40, 163,132.80 and 42,220.80

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Solution

The fourth proportional to 108,806.40, 163,132.80 and 42,220.80 is: 63,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,806.40 : 163,132.80 = 42,220.80 : x
  2. Step 2: Convert to fraction form
    108,806.40/163,132.80 = 42,220.80/x
  3. Step 3: Cross multiply
    108,806.40x = 163,132.80 × 42,220.80
  4. Step 4: Simplify right side
    108,806.40x = 6,887,597,322.24
  5. Step 5: Solve for x
    x = 6,887,597,322.24/108,806.40
  6. Step 6: Final answer
    x = 63,301.40

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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.