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Finding the Fourth Proportional to 157,855.50, 217,855.58 and 86,246.30

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Solution

The fourth proportional to 157,855.50, 217,855.58 and 86,246.30 is: 119,028.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,855.50 : 217,855.58 = 86,246.30 : x
  2. Step 2: Convert to fraction form
    157,855.50/217,855.58 = 86,246.30/x
  3. Step 3: Cross multiply
    157,855.50x = 217,855.58 × 86,246.30
  4. Step 4: Simplify right side
    157,855.50x = 18,789,237,822.76
  5. Step 5: Solve for x
    x = 18,789,237,822.76/157,855.50
  6. Step 6: Final answer
    x = 119,028.08

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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.