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Finding the Fourth Proportional to 72,006.80, 108,010.20 and 70,840.40

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Solution

The fourth proportional to 72,006.80, 108,010.20 and 70,840.40 is: 106,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,006.80 : 108,010.20 = 70,840.40 : x
  2. Step 2: Convert to fraction form
    72,006.80/108,010.20 = 70,840.40/x
  3. Step 3: Cross multiply
    72,006.80x = 108,010.20 × 70,840.40
  4. Step 4: Simplify right side
    72,006.80x = 7,651,485,772.08
  5. Step 5: Solve for x
    x = 7,651,485,772.08/72,006.80
  6. Step 6: Final answer
    x = 106,260.60

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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.