Home / 115,341.20-173,011.80-85,816.70

Finding the Fourth Proportional to 115,341.20, 173,011.80 and 85,816.70

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Solution

The fourth proportional to 115,341.20, 173,011.80 and 85,816.70 is: 128,725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,341.20 : 173,011.80 = 85,816.70 : x
  2. Step 2: Convert to fraction form
    115,341.20/173,011.80 = 85,816.70/x
  3. Step 3: Cross multiply
    115,341.20x = 173,011.80 × 85,816.70
  4. Step 4: Simplify right side
    115,341.20x = 14,847,301,737.06
  5. Step 5: Solve for x
    x = 14,847,301,737.06/115,341.20
  6. Step 6: Final answer
    x = 128,725.05

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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.