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Finding the Fourth Proportional to 101,528, 140,170.08 and 66,261.44

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Solution

The fourth proportional to 101,528, 140,170.08 and 66,261.44 is: 91,480.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,528 : 140,170.08 = 66,261.44 : x
  2. Step 2: Convert to fraction form
    101,528/140,170.08 = 66,261.44/x
  3. Step 3: Cross multiply
    101,528x = 140,170.08 × 66,261.44
  4. Step 4: Simplify right side
    101,528x = 9,287,871,345.72
  5. Step 5: Solve for x
    x = 9,287,871,345.72/101,528
  6. Step 6: Final answer
    x = 91,480.89

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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.