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Finding the Fourth Proportional to 101,578.02, 140,130.99 and 65,779.80

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Solution

The fourth proportional to 101,578.02, 140,130.99 and 65,779.80 is: 90,745.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,578.02 : 140,130.99 = 65,779.80 : x
  2. Step 2: Convert to fraction form
    101,578.02/140,130.99 = 65,779.80/x
  3. Step 3: Cross multiply
    101,578.02x = 140,130.99 × 65,779.80
  4. Step 4: Simplify right side
    101,578.02x = 9,217,788,496.00
  5. Step 5: Solve for x
    x = 9,217,788,496.00/101,578.02
  6. Step 6: Final answer
    x = 90,745.90

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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.