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Finding the Fourth Proportional to 140,118.76, 193,368.17 and 79,698.11

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Solution

The fourth proportional to 140,118.76, 193,368.17 and 79,698.11 is: 109,985.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,118.76 : 193,368.17 = 79,698.11 : x
  2. Step 2: Convert to fraction form
    140,118.76/193,368.17 = 79,698.11/x
  3. Step 3: Cross multiply
    140,118.76x = 193,368.17 × 79,698.11
  4. Step 4: Simplify right side
    140,118.76x = 15,411,077,284.67
  5. Step 5: Solve for x
    x = 15,411,077,284.67/140,118.76
  6. Step 6: Final answer
    x = 109,985.82

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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.