Home / 105,431.70-145,495.65-57,685.24

Finding the Fourth Proportional to 105,431.70, 145,495.65 and 57,685.24

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Solution

The fourth proportional to 105,431.70, 145,495.65 and 57,685.24 is: 79,605.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,431.70 : 145,495.65 = 57,685.24 : x
  2. Step 2: Convert to fraction form
    105,431.70/145,495.65 = 57,685.24/x
  3. Step 3: Cross multiply
    105,431.70x = 145,495.65 × 57,685.24
  4. Step 4: Simplify right side
    105,431.70x = 8,392,951,489.21
  5. Step 5: Solve for x
    x = 8,392,951,489.21/105,431.70
  6. Step 6: Final answer
    x = 79,605.58

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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.