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Finding the Fourth Proportional to 211,389.84, 291,732.71 and 115,902.71

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Solution

The fourth proportional to 211,389.84, 291,732.71 and 115,902.71 is: 159,953.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,389.84 : 291,732.71 = 115,902.71 : x
  2. Step 2: Convert to fraction form
    211,389.84/291,732.71 = 115,902.71/x
  3. Step 3: Cross multiply
    211,389.84x = 291,732.71 × 115,902.71
  4. Step 4: Simplify right side
    211,389.84x = 33,812,609,646.47
  5. Step 5: Solve for x
    x = 33,812,609,646.47/211,389.84
  6. Step 6: Final answer
    x = 159,953.81

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1.5x scale

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.