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Finding the Fourth Proportional to 64,819.20, 97,228.80 and 42,700.80

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Solution

The fourth proportional to 64,819.20, 97,228.80 and 42,700.80 is: 64,051.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,819.20 : 97,228.80 = 42,700.80 : x
  2. Step 2: Convert to fraction form
    64,819.20/97,228.80 = 42,700.80/x
  3. Step 3: Cross multiply
    64,819.20x = 97,228.80 × 42,700.80
  4. Step 4: Simplify right side
    64,819.20x = 4,151,747,543.04
  5. Step 5: Solve for x
    x = 4,151,747,543.04/64,819.20
  6. Step 6: Final answer
    x = 64,051.20

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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.