Home / 191,981.40-287,972.10-109,037.40

Finding the Fourth Proportional to 191,981.40, 287,972.10 and 109,037.40

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Solution

The fourth proportional to 191,981.40, 287,972.10 and 109,037.40 is: 163,556.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,981.40 : 287,972.10 = 109,037.40 : x
  2. Step 2: Convert to fraction form
    191,981.40/287,972.10 = 109,037.40/x
  3. Step 3: Cross multiply
    191,981.40x = 287,972.10 × 109,037.40
  4. Step 4: Simplify right side
    191,981.40x = 31,399,729,056.54
  5. Step 5: Solve for x
    x = 31,399,729,056.54/191,981.40
  6. Step 6: Final answer
    x = 163,556.10

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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.