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Finding the Fourth Proportional to 178,143.40, 266,988.30 and 72,843.40

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Solution

The fourth proportional to 178,143.40, 266,988.30 and 72,843.40 is: 109,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,143.40 : 266,988.30 = 72,843.40 : x
  2. Step 2: Convert to fraction form
    178,143.40/266,988.30 = 72,843.40/x
  3. Step 3: Cross multiply
    178,143.40x = 266,988.30 × 72,843.40
  4. Step 4: Simplify right side
    178,143.40x = 19,448,335,532.22
  5. Step 5: Solve for x
    x = 19,448,335,532.22/178,143.40
  6. Step 6: Final answer
    x = 109,172.36

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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.