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Finding the Fourth Proportional to 243,468.45, 335,985.76 and 136,038.57

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Solution

The fourth proportional to 243,468.45, 335,985.76 and 136,038.57 is: 187,732.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,468.45 : 335,985.76 = 136,038.57 : x
  2. Step 2: Convert to fraction form
    243,468.45/335,985.76 = 136,038.57/x
  3. Step 3: Cross multiply
    243,468.45x = 335,985.76 × 136,038.57
  4. Step 4: Simplify right side
    243,468.45x = 45,707,022,330.76
  5. Step 5: Solve for x
    x = 45,707,022,330.76/243,468.45
  6. Step 6: Final answer
    x = 187,732.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.