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Finding the Fourth Proportional to 155,894.47, 215,134.69 and 84,274.49

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Solution

The fourth proportional to 155,894.47, 215,134.69 and 84,274.49 is: 116,298.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,894.47 : 215,134.69 = 84,274.49 : x
  2. Step 2: Convert to fraction form
    155,894.47/215,134.69 = 84,274.49/x
  3. Step 3: Cross multiply
    155,894.47x = 215,134.69 × 84,274.49
  4. Step 4: Simplify right side
    155,894.47x = 18,130,364,994.70
  5. Step 5: Solve for x
    x = 18,130,364,994.70/155,894.47
  6. Step 6: Final answer
    x = 116,298.96

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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.