Home / 257,478.18-386,323.88-139,010.21

Finding the Fourth Proportional to 257,478.18, 386,323.88 and 139,010.21

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Solution

The fourth proportional to 257,478.18, 386,323.88 and 139,010.21 is: 208,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,478.18 : 386,323.88 = 139,010.21 : x
  2. Step 2: Convert to fraction form
    257,478.18/386,323.88 = 139,010.21/x
  3. Step 3: Cross multiply
    257,478.18x = 386,323.88 × 139,010.21
  4. Step 4: Simplify right side
    257,478.18x = 53,702,961,060.14
  5. Step 5: Solve for x
    x = 53,702,961,060.14/257,478.18
  6. Step 6: Final answer
    x = 208,572.86

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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.