Home / 257,421.20-386,146.48-86,574.32

Finding the Fourth Proportional to 257,421.20, 386,146.48 and 86,574.32

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Solution

The fourth proportional to 257,421.20, 386,146.48 and 86,574.32 is: 129,866.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,421.20 : 386,146.48 = 86,574.32 : x
  2. Step 2: Convert to fraction form
    257,421.20/386,146.48 = 86,574.32/x
  3. Step 3: Cross multiply
    257,421.20x = 386,146.48 × 86,574.32
  4. Step 4: Simplify right side
    257,421.20x = 33,430,368,926.39
  5. Step 5: Solve for x
    x = 33,430,368,926.39/257,421.20
  6. Step 6: Final answer
    x = 129,866.42

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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.