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Finding the Fourth Proportional to 64,991.20, 97,486.80 and 45,964.30

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Solution

The fourth proportional to 64,991.20, 97,486.80 and 45,964.30 is: 68,946.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.20 : 97,486.80 = 45,964.30 : x
  2. Step 2: Convert to fraction form
    64,991.20/97,486.80 = 45,964.30/x
  3. Step 3: Cross multiply
    64,991.20x = 97,486.80 × 45,964.30
  4. Step 4: Simplify right side
    64,991.20x = 4,480,912,521.24
  5. Step 5: Solve for x
    x = 4,480,912,521.24/64,991.20
  6. Step 6: Final answer
    x = 68,946.45

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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.