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Finding the Fourth Proportional to 76,666.50, 105,799.77 and 43,132.50

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Solution

The fourth proportional to 76,666.50, 105,799.77 and 43,132.50 is: 59,522.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,666.50 : 105,799.77 = 43,132.50 : x
  2. Step 2: Convert to fraction form
    76,666.50/105,799.77 = 43,132.50/x
  3. Step 3: Cross multiply
    76,666.50x = 105,799.77 × 43,132.50
  4. Step 4: Simplify right side
    76,666.50x = 4,563,408,579.53
  5. Step 5: Solve for x
    x = 4,563,408,579.53/76,666.50
  6. Step 6: Final answer
    x = 59,522.85

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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.