Home / 105,531.48-145,636.74-57,789.36

Finding the Fourth Proportional to 105,531.48, 145,636.74 and 57,789.36

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Solution

The fourth proportional to 105,531.48, 145,636.74 and 57,789.36 is: 79,751.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,531.48 : 145,636.74 = 57,789.36 : x
  2. Step 2: Convert to fraction form
    105,531.48/145,636.74 = 57,789.36/x
  3. Step 3: Cross multiply
    105,531.48x = 145,636.74 × 57,789.36
  4. Step 4: Simplify right side
    105,531.48x = 8,416,253,997.09
  5. Step 5: Solve for x
    x = 8,416,253,997.09/105,531.48
  6. Step 6: Final answer
    x = 79,751.12

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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.