Home / 86,512.16-119,209.64-63,815.20

Finding the Fourth Proportional to 86,512.16, 119,209.64 and 63,815.20

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Solution

The fourth proportional to 86,512.16, 119,209.64 and 63,815.20 is: 87,934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,512.16 : 119,209.64 = 63,815.20 : x
  2. Step 2: Convert to fraction form
    86,512.16/119,209.64 = 63,815.20/x
  3. Step 3: Cross multiply
    86,512.16x = 119,209.64 × 63,815.20
  4. Step 4: Simplify right side
    86,512.16x = 7,607,387,018.53
  5. Step 5: Solve for x
    x = 7,607,387,018.53/86,512.16
  6. Step 6: Final answer
    x = 87,934.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.