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Finding the Fourth Proportional to 47,619.80, 71,429.70 and 39,901.40

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Solution

The fourth proportional to 47,619.80, 71,429.70 and 39,901.40 is: 59,852.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,619.80 : 71,429.70 = 39,901.40 : x
  2. Step 2: Convert to fraction form
    47,619.80/71,429.70 = 39,901.40/x
  3. Step 3: Cross multiply
    47,619.80x = 71,429.70 × 39,901.40
  4. Step 4: Simplify right side
    47,619.80x = 2,850,145,031.58
  5. Step 5: Solve for x
    x = 2,850,145,031.58/47,619.80
  6. Step 6: Final answer
    x = 59,852.10

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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.