Home / 105,178.43-145,146.77-57,431.78

Finding the Fourth Proportional to 105,178.43, 145,146.77 and 57,431.78

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Solution

The fourth proportional to 105,178.43, 145,146.77 and 57,431.78 is: 79,256.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,178.43 : 145,146.77 = 57,431.78 : x
  2. Step 2: Convert to fraction form
    105,178.43/145,146.77 = 57,431.78/x
  3. Step 3: Cross multiply
    105,178.43x = 145,146.77 × 57,431.78
  4. Step 4: Simplify right side
    105,178.43x = 8,336,036,349.46
  5. Step 5: Solve for x
    x = 8,336,036,349.46/105,178.43
  6. Step 6: Final answer
    x = 79,256.14

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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.