Home / 207,111.12-310,784.64-80,734.88

Finding the Fourth Proportional to 207,111.12, 310,784.64 and 80,734.88

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Solution

The fourth proportional to 207,111.12, 310,784.64 and 80,734.88 is: 121,148.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,111.12 : 310,784.64 = 80,734.88 : x
  2. Step 2: Convert to fraction form
    207,111.12/310,784.64 = 80,734.88/x
  3. Step 3: Cross multiply
    207,111.12x = 310,784.64 × 80,734.88
  4. Step 4: Simplify right side
    207,111.12x = 25,091,160,616.24
  5. Step 5: Solve for x
    x = 25,091,160,616.24/207,111.12
  6. Step 6: Final answer
    x = 121,148.30

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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.