Home / 115,009.20-172,513.80-87,015.60

Finding the Fourth Proportional to 115,009.20, 172,513.80 and 87,015.60

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Solution

The fourth proportional to 115,009.20, 172,513.80 and 87,015.60 is: 130,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,009.20 : 172,513.80 = 87,015.60 : x
  2. Step 2: Convert to fraction form
    115,009.20/172,513.80 = 87,015.60/x
  3. Step 3: Cross multiply
    115,009.20x = 172,513.80 × 87,015.60
  4. Step 4: Simplify right side
    115,009.20x = 15,011,391,815.28
  5. Step 5: Solve for x
    x = 15,011,391,815.28/115,009.20
  6. Step 6: Final answer
    x = 130,523.40

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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.