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Finding the Fourth Proportional to 55,476.78, 76,365.63 and 48,390.90

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Solution

The fourth proportional to 55,476.78, 76,365.63 and 48,390.90 is: 66,611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,476.78 : 76,365.63 = 48,390.90 : x
  2. Step 2: Convert to fraction form
    55,476.78/76,365.63 = 48,390.90/x
  3. Step 3: Cross multiply
    55,476.78x = 76,365.63 × 48,390.90
  4. Step 4: Simplify right side
    55,476.78x = 3,695,401,564.77
  5. Step 5: Solve for x
    x = 3,695,401,564.77/55,476.78
  6. Step 6: Final answer
    x = 66,611.68

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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.