Home / 103,542.30-155,313.45-85,827.60

Finding the Fourth Proportional to 103,542.30, 155,313.45 and 85,827.60

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Solution

The fourth proportional to 103,542.30, 155,313.45 and 85,827.60 is: 128,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,542.30 : 155,313.45 = 85,827.60 : x
  2. Step 2: Convert to fraction form
    103,542.30/155,313.45 = 85,827.60/x
  3. Step 3: Cross multiply
    103,542.30x = 155,313.45 × 85,827.60
  4. Step 4: Simplify right side
    103,542.30x = 13,330,180,661.22
  5. Step 5: Solve for x
    x = 13,330,180,661.22/103,542.30
  6. Step 6: Final answer
    x = 128,741.40

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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.