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Finding the Fourth Proportional to 155,946.92, 215,208.04 and 86,098.47

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Solution

The fourth proportional to 155,946.92, 215,208.04 and 86,098.47 is: 118,816.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,946.92 : 215,208.04 = 86,098.47 : x
  2. Step 2: Convert to fraction form
    155,946.92/215,208.04 = 86,098.47/x
  3. Step 3: Cross multiply
    155,946.92x = 215,208.04 × 86,098.47
  4. Step 4: Simplify right side
    155,946.92x = 18,529,083,567.55
  5. Step 5: Solve for x
    x = 18,529,083,567.55/155,946.92
  6. Step 6: Final answer
    x = 118,816.60

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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.