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Finding the Fourth Proportional to 345,685.86, 518,528.79 and 109,046.93

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Solution

The fourth proportional to 345,685.86, 518,528.79 and 109,046.93 is: 163,570.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,685.86 : 518,528.79 = 109,046.93 : x
  2. Step 2: Convert to fraction form
    345,685.86/518,528.79 = 109,046.93/x
  3. Step 3: Cross multiply
    345,685.86x = 518,528.79 × 109,046.93
  4. Step 4: Simplify right side
    345,685.86x = 56,543,970,073.47
  5. Step 5: Solve for x
    x = 56,543,970,073.47/345,685.86
  6. Step 6: Final answer
    x = 163,570.39

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1.5x scale

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.