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Finding the Fourth Proportional to 105,679.80, 145,833.60 and 63,261.72

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Solution

The fourth proportional to 105,679.80, 145,833.60 and 63,261.72 is: 87,298.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.80 : 145,833.60 = 63,261.72 : x
  2. Step 2: Convert to fraction form
    105,679.80/145,833.60 = 63,261.72/x
  3. Step 3: Cross multiply
    105,679.80x = 145,833.60 × 63,261.72
  4. Step 4: Simplify right side
    105,679.80x = 9,225,684,369.79
  5. Step 5: Solve for x
    x = 9,225,684,369.79/105,679.80
  6. Step 6: Final answer
    x = 87,298.47

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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.