Home / 105,643.47-145,789.11-57,895.77

Finding the Fourth Proportional to 105,643.47, 145,789.11 and 57,895.77

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Solution

The fourth proportional to 105,643.47, 145,789.11 and 57,895.77 is: 79,896.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,643.47 : 145,789.11 = 57,895.77 : x
  2. Step 2: Convert to fraction form
    105,643.47/145,789.11 = 57,895.77/x
  3. Step 3: Cross multiply
    105,643.47x = 145,789.11 × 57,895.77
  4. Step 4: Simplify right side
    105,643.47x = 8,440,572,781.06
  5. Step 5: Solve for x
    x = 8,440,572,781.06/105,643.47
  6. Step 6: Final answer
    x = 79,896.78

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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.