Home / 225,298.08-310,899-128,487.72

Finding the Fourth Proportional to 225,298.08, 310,899 and 128,487.72

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Solution

The fourth proportional to 225,298.08, 310,899 and 128,487.72 is: 177,306.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,298.08 : 310,899 = 128,487.72 : x
  2. Step 2: Convert to fraction form
    225,298.08/310,899 = 128,487.72/x
  3. Step 3: Cross multiply
    225,298.08x = 310,899 × 128,487.72
  4. Step 4: Simplify right side
    225,298.08x = 39,946,703,660.28
  5. Step 5: Solve for x
    x = 39,946,703,660.28/225,298.08
  6. Step 6: Final answer
    x = 177,306.01

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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.