Home / 113,509.48-156,640.80-71,091.40

Finding the Fourth Proportional to 113,509.48, 156,640.80 and 71,091.40

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Solution

The fourth proportional to 113,509.48, 156,640.80 and 71,091.40 is: 98,104.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,509.48 : 156,640.80 = 71,091.40 : x
  2. Step 2: Convert to fraction form
    113,509.48/156,640.80 = 71,091.40/x
  3. Step 3: Cross multiply
    113,509.48x = 156,640.80 × 71,091.40
  4. Step 4: Simplify right side
    113,509.48x = 11,135,813,769.12
  5. Step 5: Solve for x
    x = 11,135,813,769.12/113,509.48
  6. Step 6: Final answer
    x = 98,104.70

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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.