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Finding the Fourth Proportional to 77,679.40, 107,160.90 and 45,827.08

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Solution

The fourth proportional to 77,679.40, 107,160.90 and 45,827.08 is: 63,219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,679.40 : 107,160.90 = 45,827.08 : x
  2. Step 2: Convert to fraction form
    77,679.40/107,160.90 = 45,827.08/x
  3. Step 3: Cross multiply
    77,679.40x = 107,160.90 × 45,827.08
  4. Step 4: Simplify right side
    77,679.40x = 4,910,871,137.17
  5. Step 5: Solve for x
    x = 4,910,871,137.17/77,679.40
  6. Step 6: Final answer
    x = 63,219.74

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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.