Home / 105,145.64-145,101.20-57,399.78

Finding the Fourth Proportional to 105,145.64, 145,101.20 and 57,399.78

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Solution

The fourth proportional to 105,145.64, 145,101.20 and 57,399.78 is: 79,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,145.64 : 145,101.20 = 57,399.78 : x
  2. Step 2: Convert to fraction form
    105,145.64/145,101.20 = 57,399.78/x
  3. Step 3: Cross multiply
    105,145.64x = 145,101.20 × 57,399.78
  4. Step 4: Simplify right side
    105,145.64x = 8,328,776,670.74
  5. Step 5: Solve for x
    x = 8,328,776,670.74/105,145.64
  6. Step 6: Final answer
    x = 79,211.82

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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.