Home / 105,538.32-145,643.13-57,140.75

Finding the Fourth Proportional to 105,538.32, 145,643.13 and 57,140.75

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Solution

The fourth proportional to 105,538.32, 145,643.13 and 57,140.75 is: 78,854.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,538.32 : 145,643.13 = 57,140.75 : x
  2. Step 2: Convert to fraction form
    105,538.32/145,643.13 = 57,140.75/x
  3. Step 3: Cross multiply
    105,538.32x = 145,643.13 × 57,140.75
  4. Step 4: Simplify right side
    105,538.32x = 8,322,158,044.66
  5. Step 5: Solve for x
    x = 8,322,158,044.66/105,538.32
  6. Step 6: Final answer
    x = 78,854.37

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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.