Home / 105,140.44-145,011.54-67,418.20

Finding the Fourth Proportional to 105,140.44, 145,011.54 and 67,418.20

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Solution

The fourth proportional to 105,140.44, 145,011.54 and 67,418.20 is: 92,984.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,140.44 : 145,011.54 = 67,418.20 : x
  2. Step 2: Convert to fraction form
    105,140.44/145,011.54 = 67,418.20/x
  3. Step 3: Cross multiply
    105,140.44x = 145,011.54 × 67,418.20
  4. Step 4: Simplify right side
    105,140.44x = 9,776,417,006.03
  5. Step 5: Solve for x
    x = 9,776,417,006.03/105,140.44
  6. Step 6: Final answer
    x = 92,984.36

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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.