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Finding the Fourth Proportional to 191,190.80, 286,656.60 and 72,844.40

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Solution

The fourth proportional to 191,190.80, 286,656.60 and 72,844.40 is: 109,217.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,190.80 : 286,656.60 = 72,844.40 : x
  2. Step 2: Convert to fraction form
    191,190.80/286,656.60 = 72,844.40/x
  3. Step 3: Cross multiply
    191,190.80x = 286,656.60 × 72,844.40
  4. Step 4: Simplify right side
    191,190.80x = 20,881,328,033.04
  5. Step 5: Solve for x
    x = 20,881,328,033.04/191,190.80
  6. Step 6: Final answer
    x = 109,217.22

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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.