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Finding the Fourth Proportional to 153,964.80, 212,284.80 and 118,195.20

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Solution

The fourth proportional to 153,964.80, 212,284.80 and 118,195.20 is: 162,966.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,964.80 : 212,284.80 = 118,195.20 : x
  2. Step 2: Convert to fraction form
    153,964.80/212,284.80 = 118,195.20/x
  3. Step 3: Cross multiply
    153,964.80x = 212,284.80 × 118,195.20
  4. Step 4: Simplify right side
    153,964.80x = 25,091,044,392.96
  5. Step 5: Solve for x
    x = 25,091,044,392.96/153,964.80
  6. Step 6: Final answer
    x = 162,966.11

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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.