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Finding the Fourth Proportional to 72,005.80, 100,911.80 and 72,005.80

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Solution

The fourth proportional to 72,005.80, 100,911.80 and 72,005.80 is: 100,911.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,005.80 : 100,911.80 = 72,005.80 : x
  2. Step 2: Convert to fraction form
    72,005.80/100,911.80 = 72,005.80/x
  3. Step 3: Cross multiply
    72,005.80x = 100,911.80 × 72,005.80
  4. Step 4: Simplify right side
    72,005.80x = 7,266,234,888.44
  5. Step 5: Solve for x
    x = 7,266,234,888.44/72,005.80
  6. Step 6: Final answer
    x = 100,911.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.