Home / 210,010.30-315,015.45-121,436.80

Finding the Fourth Proportional to 210,010.30, 315,015.45 and 121,436.80

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Solution

The fourth proportional to 210,010.30, 315,015.45 and 121,436.80 is: 182,155.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,010.30 : 315,015.45 = 121,436.80 : x
  2. Step 2: Convert to fraction form
    210,010.30/315,015.45 = 121,436.80/x
  3. Step 3: Cross multiply
    210,010.30x = 315,015.45 × 121,436.80
  4. Step 4: Simplify right side
    210,010.30x = 38,254,468,198.56
  5. Step 5: Solve for x
    x = 38,254,468,198.56/210,010.30
  6. Step 6: Final answer
    x = 182,155.20

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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.