Home / 257,960.16-387,051.60-139,716

Finding the Fourth Proportional to 257,960.16, 387,051.60 and 139,716

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Solution

The fourth proportional to 257,960.16, 387,051.60 and 139,716 is: 209,634.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,960.16 : 387,051.60 = 139,716 : x
  2. Step 2: Convert to fraction form
    257,960.16/387,051.60 = 139,716/x
  3. Step 3: Cross multiply
    257,960.16x = 387,051.60 × 139,716
  4. Step 4: Simplify right side
    257,960.16x = 54,077,301,345.60
  5. Step 5: Solve for x
    x = 54,077,301,345.60/257,960.16
  6. Step 6: Final answer
    x = 209,634.31

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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.