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Finding the Fourth Proportional to 155,064.87, 213,973.59 and 87,089.36

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Solution

The fourth proportional to 155,064.87, 213,973.59 and 87,089.36 is: 120,174.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,064.87 : 213,973.59 = 87,089.36 : x
  2. Step 2: Convert to fraction form
    155,064.87/213,973.59 = 87,089.36/x
  3. Step 3: Cross multiply
    155,064.87x = 213,973.59 × 87,089.36
  4. Step 4: Simplify right side
    155,064.87x = 18,634,821,940.13
  5. Step 5: Solve for x
    x = 18,634,821,940.13/155,064.87
  6. Step 6: Final answer
    x = 120,174.36

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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.