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Finding the Fourth Proportional to 71,521.30, 107,330.55 and 39,931.30

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Solution

The fourth proportional to 71,521.30, 107,330.55 and 39,931.30 is: 59,924.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,521.30 : 107,330.55 = 39,931.30 : x
  2. Step 2: Convert to fraction form
    71,521.30/107,330.55 = 39,931.30/x
  3. Step 3: Cross multiply
    71,521.30x = 107,330.55 × 39,931.30
  4. Step 4: Simplify right side
    71,521.30x = 4,285,848,391.22
  5. Step 5: Solve for x
    x = 4,285,848,391.22/71,521.30
  6. Step 6: Final answer
    x = 59,924.08

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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.