Home / 105,038.92-145,007.22-81,111.88

Finding the Fourth Proportional to 105,038.92, 145,007.22 and 81,111.88

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Solution

The fourth proportional to 105,038.92, 145,007.22 and 81,111.88 is: 111,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,038.92 : 145,007.22 = 81,111.88 : x
  2. Step 2: Convert to fraction form
    105,038.92/145,007.22 = 81,111.88/x
  3. Step 3: Cross multiply
    105,038.92x = 145,007.22 × 81,111.88
  4. Step 4: Simplify right side
    105,038.92x = 11,761,808,227.77
  5. Step 5: Solve for x
    x = 11,761,808,227.77/105,038.92
  6. Step 6: Final answer
    x = 111,975.72

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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.