Home / 205,457.28-308,024.40-138,057.72

Finding the Fourth Proportional to 205,457.28, 308,024.40 and 138,057.72

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Solution

The fourth proportional to 205,457.28, 308,024.40 and 138,057.72 is: 206,978.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,457.28 : 308,024.40 = 138,057.72 : x
  2. Step 2: Convert to fraction form
    205,457.28/308,024.40 = 138,057.72/x
  3. Step 3: Cross multiply
    205,457.28x = 308,024.40 × 138,057.72
  4. Step 4: Simplify right side
    205,457.28x = 42,525,146,368.37
  5. Step 5: Solve for x
    x = 42,525,146,368.37/205,457.28
  6. Step 6: Final answer
    x = 206,978.05

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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.