Home / 105,115.28-145,032.84-67,440.56

Finding the Fourth Proportional to 105,115.28, 145,032.84 and 67,440.56

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Solution

The fourth proportional to 105,115.28, 145,032.84 and 67,440.56 is: 93,051.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,115.28 : 145,032.84 = 67,440.56 : x
  2. Step 2: Convert to fraction form
    105,115.28/145,032.84 = 67,440.56/x
  3. Step 3: Cross multiply
    105,115.28x = 145,032.84 × 67,440.56
  4. Step 4: Simplify right side
    105,115.28x = 9,781,095,947.99
  5. Step 5: Solve for x
    x = 9,781,095,947.99/105,115.28
  6. Step 6: Final answer
    x = 93,051.13

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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.