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Finding the Fourth Proportional to 154,710.36, 213,500.64 and 87,642.36

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Solution

The fourth proportional to 154,710.36, 213,500.64 and 87,642.36 is: 120,946.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,710.36 : 213,500.64 = 87,642.36 : x
  2. Step 2: Convert to fraction form
    154,710.36/213,500.64 = 87,642.36/x
  3. Step 3: Cross multiply
    154,710.36x = 213,500.64 × 87,642.36
  4. Step 4: Simplify right side
    154,710.36x = 18,711,699,951.11
  5. Step 5: Solve for x
    x = 18,711,699,951.11/154,710.36
  6. Step 6: Final answer
    x = 120,946.65

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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.