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Finding the Fourth Proportional to 105,080.94, 145,012.14 and 57,335.28

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Solution

The fourth proportional to 105,080.94, 145,012.14 and 57,335.28 is: 79,122.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,080.94 : 145,012.14 = 57,335.28 : x
  2. Step 2: Convert to fraction form
    105,080.94/145,012.14 = 57,335.28/x
  3. Step 3: Cross multiply
    105,080.94x = 145,012.14 × 57,335.28
  4. Step 4: Simplify right side
    105,080.94x = 8,314,311,650.30
  5. Step 5: Solve for x
    x = 8,314,311,650.30/105,080.94
  6. Step 6: Final answer
    x = 79,122.93

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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.