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Finding the Fourth Proportional to 101,155.72, 139,566.90 and 65,347.24

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Solution

The fourth proportional to 101,155.72, 139,566.90 and 65,347.24 is: 90,161.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,155.72 : 139,566.90 = 65,347.24 : x
  2. Step 2: Convert to fraction form
    101,155.72/139,566.90 = 65,347.24/x
  3. Step 3: Cross multiply
    101,155.72x = 139,566.90 × 65,347.24
  4. Step 4: Simplify right side
    101,155.72x = 9,120,311,710.36
  5. Step 5: Solve for x
    x = 9,120,311,710.36/101,155.72
  6. Step 6: Final answer
    x = 90,161.11

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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.