Home / 210,008.80-315,013.20-115,202.35

Finding the Fourth Proportional to 210,008.80, 315,013.20 and 115,202.35

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Solution

The fourth proportional to 210,008.80, 315,013.20 and 115,202.35 is: 172,803.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,008.80 : 315,013.20 = 115,202.35 : x
  2. Step 2: Convert to fraction form
    210,008.80/315,013.20 = 115,202.35/x
  3. Step 3: Cross multiply
    210,008.80x = 315,013.20 × 115,202.35
  4. Step 4: Simplify right side
    210,008.80x = 36,290,260,921.02
  5. Step 5: Solve for x
    x = 36,290,260,921.02/210,008.80
  6. Step 6: Final answer
    x = 172,803.53

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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.