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Finding the Fourth Proportional to 191,309.99, 286,702.49 and 121,063.55

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Solution

The fourth proportional to 191,309.99, 286,702.49 and 121,063.55 is: 181,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,309.99 : 286,702.49 = 121,063.55 : x
  2. Step 2: Convert to fraction form
    191,309.99/286,702.49 = 121,063.55/x
  3. Step 3: Cross multiply
    191,309.99x = 286,702.49 × 121,063.55
  4. Step 4: Simplify right side
    191,309.99x = 34,709,220,102.39
  5. Step 5: Solve for x
    x = 34,709,220,102.39/191,309.99
  6. Step 6: Final answer
    x = 181,429.21

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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.