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Finding the Fourth Proportional to 155,894.72, 215,135.03 and 84,274.74

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Solution

The fourth proportional to 155,894.72, 215,135.03 and 84,274.74 is: 116,299.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,894.72 : 215,135.03 = 84,274.74 : x
  2. Step 2: Convert to fraction form
    155,894.72/215,135.03 = 84,274.74/x
  3. Step 3: Cross multiply
    155,894.72x = 215,135.03 × 84,274.74
  4. Step 4: Simplify right side
    155,894.72x = 18,130,448,718.14
  5. Step 5: Solve for x
    x = 18,130,448,718.14/155,894.72
  6. Step 6: Final answer
    x = 116,299.31

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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.