Home / 108,168.32-149,179.20-70,428.80

Finding the Fourth Proportional to 108,168.32, 149,179.20 and 70,428.80

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Solution

The fourth proportional to 108,168.32, 149,179.20 and 70,428.80 is: 97,131.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,168.32 : 149,179.20 = 70,428.80 : x
  2. Step 2: Convert to fraction form
    108,168.32/149,179.20 = 70,428.80/x
  3. Step 3: Cross multiply
    108,168.32x = 149,179.20 × 70,428.80
  4. Step 4: Simplify right side
    108,168.32x = 10,506,512,040.96
  5. Step 5: Solve for x
    x = 10,506,512,040.96/108,168.32
  6. Step 6: Final answer
    x = 97,131.14

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1.5x scale

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.