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Finding the Fourth Proportional to 85,488.74, 128,240.40 and 22,317.24

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Solution

The fourth proportional to 85,488.74, 128,240.40 and 22,317.24 is: 33,477.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,488.74 : 128,240.40 = 22,317.24 : x
  2. Step 2: Convert to fraction form
    85,488.74/128,240.40 = 22,317.24/x
  3. Step 3: Cross multiply
    85,488.74x = 128,240.40 × 22,317.24
  4. Step 4: Simplify right side
    85,488.74x = 2,861,971,784.50
  5. Step 5: Solve for x
    x = 2,861,971,784.50/85,488.74
  6. Step 6: Final answer
    x = 33,477.76

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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.