Home / 108,289.20-149,485.16-65,861.36

Finding the Fourth Proportional to 108,289.20, 149,485.16 and 65,861.36

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Solution

The fourth proportional to 108,289.20, 149,485.16 and 65,861.36 is: 90,916.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,289.20 : 149,485.16 = 65,861.36 : x
  2. Step 2: Convert to fraction form
    108,289.20/149,485.16 = 65,861.36/x
  3. Step 3: Cross multiply
    108,289.20x = 149,485.16 × 65,861.36
  4. Step 4: Simplify right side
    108,289.20x = 9,845,295,937.42
  5. Step 5: Solve for x
    x = 9,845,295,937.42/108,289.20
  6. Step 6: Final answer
    x = 90,916.69

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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.