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Finding the Fourth Proportional to 69,579.50, 96,019.68 and 39,364.20

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Solution

The fourth proportional to 69,579.50, 96,019.68 and 39,364.20 is: 54,322.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,579.50 : 96,019.68 = 39,364.20 : x
  2. Step 2: Convert to fraction form
    69,579.50/96,019.68 = 39,364.20/x
  3. Step 3: Cross multiply
    69,579.50x = 96,019.68 × 39,364.20
  4. Step 4: Simplify right side
    69,579.50x = 3,779,737,887.46
  5. Step 5: Solve for x
    x = 3,779,737,887.46/69,579.50
  6. Step 6: Final answer
    x = 54,322.58

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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.