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Finding the Fourth Proportional to 153,571.14, 211,855.74 and 89,869.50

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Solution

The fourth proportional to 153,571.14, 211,855.74 and 89,869.50 is: 123,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,571.14 : 211,855.74 = 89,869.50 : x
  2. Step 2: Convert to fraction form
    153,571.14/211,855.74 = 89,869.50/x
  3. Step 3: Cross multiply
    153,571.14x = 211,855.74 × 89,869.50
  4. Step 4: Simplify right side
    153,571.14x = 19,039,369,425.93
  5. Step 5: Solve for x
    x = 19,039,369,425.93/153,571.14
  6. Step 6: Final answer
    x = 123,977.52

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1.5x scale

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.