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Finding the Fourth Proportional to 202,720.90, 279,752.86 and 112,079.06

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Solution

The fourth proportional to 202,720.90, 279,752.86 and 112,079.06 is: 154,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,720.90 : 279,752.86 = 112,079.06 : x
  2. Step 2: Convert to fraction form
    202,720.90/279,752.86 = 112,079.06/x
  3. Step 3: Cross multiply
    202,720.90x = 279,752.86 × 112,079.06
  4. Step 4: Simplify right side
    202,720.90x = 31,354,437,581.11
  5. Step 5: Solve for x
    x = 31,354,437,581.11/202,720.90
  6. Step 6: Final answer
    x = 154,668.01

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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.