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Finding the Fourth Proportional to 108,013.60, 162,020.40 and 103,639.60

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Solution

The fourth proportional to 108,013.60, 162,020.40 and 103,639.60 is: 155,459.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,013.60 : 162,020.40 = 103,639.60 : x
  2. Step 2: Convert to fraction form
    108,013.60/162,020.40 = 103,639.60/x
  3. Step 3: Cross multiply
    108,013.60x = 162,020.40 × 103,639.60
  4. Step 4: Simplify right side
    108,013.60x = 16,791,729,447.84
  5. Step 5: Solve for x
    x = 16,791,729,447.84/108,013.60
  6. Step 6: Final answer
    x = 155,459.40

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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.