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Finding the Fourth Proportional to 77,421.54, 106,845.48 and 45,600.66

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Solution

The fourth proportional to 77,421.54, 106,845.48 and 45,600.66 is: 62,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,421.54 : 106,845.48 = 45,600.66 : x
  2. Step 2: Convert to fraction form
    77,421.54/106,845.48 = 45,600.66/x
  3. Step 3: Cross multiply
    77,421.54x = 106,845.48 × 45,600.66
  4. Step 4: Simplify right side
    77,421.54x = 4,872,224,406.02
  5. Step 5: Solve for x
    x = 4,872,224,406.02/77,421.54
  6. Step 6: Final answer
    x = 62,931.12

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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.