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Finding the Fourth Proportional to 390,063.90, 585,045.63 and 123,827.43

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Solution

The fourth proportional to 390,063.90, 585,045.63 and 123,827.43 is: 185,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,063.90 : 585,045.63 = 123,827.43 : x
  2. Step 2: Convert to fraction form
    390,063.90/585,045.63 = 123,827.43/x
  3. Step 3: Cross multiply
    390,063.90x = 585,045.63 × 123,827.43
  4. Step 4: Simplify right side
    390,063.90x = 72,444,696,795.63
  5. Step 5: Solve for x
    x = 72,444,696,795.63/390,063.90
  6. Step 6: Final answer
    x = 185,725.20

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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.