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Finding the Fourth Proportional to 103,714.97, 143,129.53 and 63,428.00

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Solution

The fourth proportional to 103,714.97, 143,129.53 and 63,428.00 is: 87,532.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,714.97 : 143,129.53 = 63,428.00 : x
  2. Step 2: Convert to fraction form
    103,714.97/143,129.53 = 63,428.00/x
  3. Step 3: Cross multiply
    103,714.97x = 143,129.53 × 63,428.00
  4. Step 4: Simplify right side
    103,714.97x = 9,078,419,192.48
  5. Step 5: Solve for x
    x = 9,078,419,192.48/103,714.97
  6. Step 6: Final answer
    x = 87,532.39

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1.5x scale

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.