Home / 257,420.16-386,147.52-70,433.28

Finding the Fourth Proportional to 257,420.16, 386,147.52 and 70,433.28

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Solution

The fourth proportional to 257,420.16, 386,147.52 and 70,433.28 is: 105,654.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,420.16 : 386,147.52 = 70,433.28 : x
  2. Step 2: Convert to fraction form
    257,420.16/386,147.52 = 70,433.28/x
  3. Step 3: Cross multiply
    257,420.16x = 386,147.52 × 70,433.28
  4. Step 4: Simplify right side
    257,420.16x = 27,197,636,397.47
  5. Step 5: Solve for x
    x = 27,197,636,397.47/257,420.16
  6. Step 6: Final answer
    x = 105,654.65

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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.