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Finding the Fourth Proportional to 101,489.31, 140,055.53 and 56,170.42

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Solution

The fourth proportional to 101,489.31, 140,055.53 and 56,170.42 is: 77,515.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,489.31 : 140,055.53 = 56,170.42 : x
  2. Step 2: Convert to fraction form
    101,489.31/140,055.53 = 56,170.42/x
  3. Step 3: Cross multiply
    101,489.31x = 140,055.53 × 56,170.42
  4. Step 4: Simplify right side
    101,489.31x = 7,866,977,312.43
  5. Step 5: Solve for x
    x = 7,866,977,312.43/101,489.31
  6. Step 6: Final answer
    x = 77,515.33

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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.