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Finding the Fourth Proportional to 108,531.40, 162,480.30 and 77,427.40

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Solution

The fourth proportional to 108,531.40, 162,480.30 and 77,427.40 is: 115,915.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,531.40 : 162,480.30 = 77,427.40 : x
  2. Step 2: Convert to fraction form
    108,531.40/162,480.30 = 77,427.40/x
  3. Step 3: Cross multiply
    108,531.40x = 162,480.30 × 77,427.40
  4. Step 4: Simplify right side
    108,531.40x = 12,580,427,180.22
  5. Step 5: Solve for x
    x = 12,580,427,180.22/108,531.40
  6. Step 6: Final answer
    x = 115,915.09

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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.