Home / 257,972.96-386,949.36-70,979.36

Finding the Fourth Proportional to 257,972.96, 386,949.36 and 70,979.36

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Solution

The fourth proportional to 257,972.96, 386,949.36 and 70,979.36 is: 106,466.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,972.96 : 386,949.36 = 70,979.36 : x
  2. Step 2: Convert to fraction form
    257,972.96/386,949.36 = 70,979.36/x
  3. Step 3: Cross multiply
    257,972.96x = 386,949.36 × 70,979.36
  4. Step 4: Simplify right side
    257,972.96x = 27,465,417,925.21
  5. Step 5: Solve for x
    x = 27,465,417,925.21/257,972.96
  6. Step 6: Final answer
    x = 106,466.27

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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.