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Finding the Fourth Proportional to 101,699.88, 140,190.28 and 71,400.20

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Solution

The fourth proportional to 101,699.88, 140,190.28 and 71,400.20 is: 98,423.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,699.88 : 140,190.28 = 71,400.20 : x
  2. Step 2: Convert to fraction form
    101,699.88/140,190.28 = 71,400.20/x
  3. Step 3: Cross multiply
    101,699.88x = 140,190.28 × 71,400.20
  4. Step 4: Simplify right side
    101,699.88x = 10,009,614,030.06
  5. Step 5: Solve for x
    x = 10,009,614,030.06/101,699.88
  6. Step 6: Final answer
    x = 98,423.07

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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.