Home / 101,208.08-139,708.34-65,401.04

Finding the Fourth Proportional to 101,208.08, 139,708.34 and 65,401.04

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Solution

The fourth proportional to 101,208.08, 139,708.34 and 65,401.04 is: 90,280.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,208.08 : 139,708.34 = 65,401.04 : x
  2. Step 2: Convert to fraction form
    101,208.08/139,708.34 = 65,401.04/x
  3. Step 3: Cross multiply
    101,208.08x = 139,708.34 × 65,401.04
  4. Step 4: Simplify right side
    101,208.08x = 9,137,069,707.13
  5. Step 5: Solve for x
    x = 9,137,069,707.13/101,208.08
  6. Step 6: Final answer
    x = 90,280.05

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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.