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Finding the Fourth Proportional to 72,277.60, 108,416.40 and 64,914.70

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Solution

The fourth proportional to 72,277.60, 108,416.40 and 64,914.70 is: 97,372.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,277.60 : 108,416.40 = 64,914.70 : x
  2. Step 2: Convert to fraction form
    72,277.60/108,416.40 = 64,914.70/x
  3. Step 3: Cross multiply
    72,277.60x = 108,416.40 × 64,914.70
  4. Step 4: Simplify right side
    72,277.60x = 7,037,818,081.08
  5. Step 5: Solve for x
    x = 7,037,818,081.08/72,277.60
  6. Step 6: Final answer
    x = 97,372.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.