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Finding the Fourth Proportional to 191,909.20, 287,496.60 and 103,133.20

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Solution

The fourth proportional to 191,909.20, 287,496.60 and 103,133.20 is: 154,502.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,909.20 : 287,496.60 = 103,133.20 : x
  2. Step 2: Convert to fraction form
    191,909.20/287,496.60 = 103,133.20/x
  3. Step 3: Cross multiply
    191,909.20x = 287,496.60 × 103,133.20
  4. Step 4: Simplify right side
    191,909.20x = 29,650,444,347.12
  5. Step 5: Solve for x
    x = 29,650,444,347.12/191,909.20
  6. Step 6: Final answer
    x = 154,502.46

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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.