Home / 105,538.36-145,638.12-63,120.28

Finding the Fourth Proportional to 105,538.36, 145,638.12 and 63,120.28

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Solution

The fourth proportional to 105,538.36, 145,638.12 and 63,120.28 is: 87,103.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,538.36 : 145,638.12 = 63,120.28 : x
  2. Step 2: Convert to fraction form
    105,538.36/145,638.12 = 63,120.28/x
  3. Step 3: Cross multiply
    105,538.36x = 145,638.12 × 63,120.28
  4. Step 4: Simplify right side
    105,538.36x = 9,192,718,913.07
  5. Step 5: Solve for x
    x = 9,192,718,913.07/105,538.36
  6. Step 6: Final answer
    x = 87,103.11

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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.