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Finding the Fourth Proportional to 213,179.96, 319,581.75 and 86,925.80

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Solution

The fourth proportional to 213,179.96, 319,581.75 and 86,925.80 is: 130,311.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,179.96 : 319,581.75 = 86,925.80 : x
  2. Step 2: Convert to fraction form
    213,179.96/319,581.75 = 86,925.80/x
  3. Step 3: Cross multiply
    213,179.96x = 319,581.75 × 86,925.80
  4. Step 4: Simplify right side
    213,179.96x = 27,779,899,284.15
  5. Step 5: Solve for x
    x = 27,779,899,284.15/213,179.96
  6. Step 6: Final answer
    x = 130,311.96

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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.