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Finding the Fourth Proportional to 155,634.92, 215,643.54 and 152,271.80

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Solution

The fourth proportional to 155,634.92, 215,643.54 and 152,271.80 is: 210,983.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,634.92 : 215,643.54 = 152,271.80 : x
  2. Step 2: Convert to fraction form
    155,634.92/215,643.54 = 152,271.80/x
  3. Step 3: Cross multiply
    155,634.92x = 215,643.54 × 152,271.80
  4. Step 4: Simplify right side
    155,634.92x = 32,836,429,994.17
  5. Step 5: Solve for x
    x = 32,836,429,994.17/155,634.92
  6. Step 6: Final answer
    x = 210,983.69

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.