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Finding the Fourth Proportional to 157,908.84, 217,913.94 and 86,288.88

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Solution

The fourth proportional to 157,908.84, 217,913.94 and 86,288.88 is: 119,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,908.84 : 217,913.94 = 86,288.88 : x
  2. Step 2: Convert to fraction form
    157,908.84/217,913.94 = 86,288.88/x
  3. Step 3: Cross multiply
    157,908.84x = 217,913.94 × 86,288.88
  4. Step 4: Simplify right side
    157,908.84x = 18,803,549,818.99
  5. Step 5: Solve for x
    x = 18,803,549,818.99/157,908.84
  6. Step 6: Final answer
    x = 119,078.51

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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.