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Finding the Fourth Proportional to 191,368, 287,121.12 and 60,040

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Solution

The fourth proportional to 191,368, 287,121.12 and 60,040 is: 90,081.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,368 : 287,121.12 = 60,040 : x
  2. Step 2: Convert to fraction form
    191,368/287,121.12 = 60,040/x
  3. Step 3: Cross multiply
    191,368x = 287,121.12 × 60,040
  4. Step 4: Simplify right side
    191,368x = 17,238,752,044.80
  5. Step 5: Solve for x
    x = 17,238,752,044.80/191,368
  6. Step 6: Final answer
    x = 90,081.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.