Home / 105,177.43-145,145.39-57,430.78

Finding the Fourth Proportional to 105,177.43, 145,145.39 and 57,430.78

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Solution

The fourth proportional to 105,177.43, 145,145.39 and 57,430.78 is: 79,254.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,177.43 : 145,145.39 = 57,430.78 : x
  2. Step 2: Convert to fraction form
    105,177.43/145,145.39 = 57,430.78/x
  3. Step 3: Cross multiply
    105,177.43x = 145,145.39 × 57,430.78
  4. Step 4: Simplify right side
    105,177.43x = 8,335,812,673.95
  5. Step 5: Solve for x
    x = 8,335,812,673.95/105,177.43
  6. Step 6: Final answer
    x = 79,254.77

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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.