Home / 207,984.24-312,009-89,689.20

Finding the Fourth Proportional to 207,984.24, 312,009 and 89,689.20

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Solution

The fourth proportional to 207,984.24, 312,009 and 89,689.20 is: 134,547.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,984.24 : 312,009 = 89,689.20 : x
  2. Step 2: Convert to fraction form
    207,984.24/312,009 = 89,689.20/x
  3. Step 3: Cross multiply
    207,984.24x = 312,009 × 89,689.20
  4. Step 4: Simplify right side
    207,984.24x = 27,983,837,602.80
  5. Step 5: Solve for x
    x = 27,983,837,602.80/207,984.24
  6. Step 6: Final answer
    x = 134,547.88

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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.