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Finding the Fourth Proportional to 128,075.73, 176,747.29 and 70,714.86

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Solution

The fourth proportional to 128,075.73, 176,747.29 and 70,714.86 is: 97,588.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,075.73 : 176,747.29 = 70,714.86 : x
  2. Step 2: Convert to fraction form
    128,075.73/176,747.29 = 70,714.86/x
  3. Step 3: Cross multiply
    128,075.73x = 176,747.29 × 70,714.86
  4. Step 4: Simplify right side
    128,075.73x = 12,498,659,867.73
  5. Step 5: Solve for x
    x = 12,498,659,867.73/128,075.73
  6. Step 6: Final answer
    x = 97,588.04

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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.