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Finding the Fourth Proportional to 357,651.78, 536,476.30 and 91,411.87

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Solution

The fourth proportional to 357,651.78, 536,476.30 and 91,411.87 is: 137,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,651.78 : 536,476.30 = 91,411.87 : x
  2. Step 2: Convert to fraction form
    357,651.78/536,476.30 = 91,411.87/x
  3. Step 3: Cross multiply
    357,651.78x = 536,476.30 × 91,411.87
  4. Step 4: Simplify right side
    357,651.78x = 49,040,300,106.66
  5. Step 5: Solve for x
    x = 49,040,300,106.66/357,651.78
  6. Step 6: Final answer
    x = 137,117.45

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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.