Home / 208,215.21-287,337.08-112,721.90

Finding the Fourth Proportional to 208,215.21, 287,337.08 and 112,721.90

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Solution

The fourth proportional to 208,215.21, 287,337.08 and 112,721.90 is: 155,556.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,215.21 : 287,337.08 = 112,721.90 : x
  2. Step 2: Convert to fraction form
    208,215.21/287,337.08 = 112,721.90/x
  3. Step 3: Cross multiply
    208,215.21x = 287,337.08 × 112,721.90
  4. Step 4: Simplify right side
    208,215.21x = 32,389,182,598.20
  5. Step 5: Solve for x
    x = 32,389,182,598.20/208,215.21
  6. Step 6: Final answer
    x = 155,556.28

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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.