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Finding the Fourth Proportional to 191,878.40, 287,574.60 and 73,391.60

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Solution

The fourth proportional to 191,878.40, 287,574.60 and 73,391.60 is: 109,994.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,878.40 : 287,574.60 = 73,391.60 : x
  2. Step 2: Convert to fraction form
    191,878.40/287,574.60 = 73,391.60/x
  3. Step 3: Cross multiply
    191,878.40x = 287,574.60 × 73,391.60
  4. Step 4: Simplify right side
    191,878.40x = 21,105,560,013.36
  5. Step 5: Solve for x
    x = 21,105,560,013.36/191,878.40
  6. Step 6: Final answer
    x = 109,994.45

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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.