Home / 105,720.20-145,900.62-69,847.28

Finding the Fourth Proportional to 105,720.20, 145,900.62 and 69,847.28

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Solution

The fourth proportional to 105,720.20, 145,900.62 and 69,847.28 is: 96,393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,720.20 : 145,900.62 = 69,847.28 : x
  2. Step 2: Convert to fraction form
    105,720.20/145,900.62 = 69,847.28/x
  3. Step 3: Cross multiply
    105,720.20x = 145,900.62 × 69,847.28
  4. Step 4: Simplify right side
    105,720.20x = 10,190,761,457.31
  5. Step 5: Solve for x
    x = 10,190,761,457.31/105,720.20
  6. Step 6: Final answer
    x = 96,393.70

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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.