Home / 105,089.28-145,020.36-57,342.64

Finding the Fourth Proportional to 105,089.28, 145,020.36 and 57,342.64

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Solution

The fourth proportional to 105,089.28, 145,020.36 and 57,342.64 is: 79,131.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,089.28 : 145,020.36 = 57,342.64 : x
  2. Step 2: Convert to fraction form
    105,089.28/145,020.36 = 57,342.64/x
  3. Step 3: Cross multiply
    105,089.28x = 145,020.36 × 57,342.64
  4. Step 4: Simplify right side
    105,089.28x = 8,315,850,296.15
  5. Step 5: Solve for x
    x = 8,315,850,296.15/105,089.28
  6. Step 6: Final answer
    x = 79,131.29

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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.