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Finding the Fourth Proportional to 75,659.16, 104,422.13 and 57,720.30

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Solution

The fourth proportional to 75,659.16, 104,422.13 and 57,720.30 is: 79,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,659.16 : 104,422.13 = 57,720.30 : x
  2. Step 2: Convert to fraction form
    75,659.16/104,422.13 = 57,720.30/x
  3. Step 3: Cross multiply
    75,659.16x = 104,422.13 × 57,720.30
  4. Step 4: Simplify right side
    75,659.16x = 6,027,276,206.51
  5. Step 5: Solve for x
    x = 6,027,276,206.51/75,659.16
  6. Step 6: Final answer
    x = 79,663.53

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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.