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Finding the Fourth Proportional to 70,066.51, 105,141.26 and 65,633.47

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Solution

The fourth proportional to 70,066.51, 105,141.26 and 65,633.47 is: 98,489.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,066.51 : 105,141.26 = 65,633.47 : x
  2. Step 2: Convert to fraction form
    70,066.51/105,141.26 = 65,633.47/x
  3. Step 3: Cross multiply
    70,066.51x = 105,141.26 × 65,633.47
  4. Step 4: Simplify right side
    70,066.51x = 6,900,785,635.20
  5. Step 5: Solve for x
    x = 6,900,785,635.20/70,066.51
  6. Step 6: Final answer
    x = 98,489.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.