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Finding the Fourth Proportional to 76,522.72, 105,477.54 and 57,108.64

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Solution

The fourth proportional to 76,522.72, 105,477.54 and 57,108.64 is: 78,717.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,522.72 : 105,477.54 = 57,108.64 : x
  2. Step 2: Convert to fraction form
    76,522.72/105,477.54 = 57,108.64/x
  3. Step 3: Cross multiply
    76,522.72x = 105,477.54 × 57,108.64
  4. Step 4: Simplify right side
    76,522.72x = 6,023,678,859.95
  5. Step 5: Solve for x
    x = 6,023,678,859.95/76,522.72
  6. Step 6: Final answer
    x = 78,717.52

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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.