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Finding the Fourth Proportional to 64,870.40, 97,305.60 and 18,123.20

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Solution

The fourth proportional to 64,870.40, 97,305.60 and 18,123.20 is: 27,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,870.40 : 97,305.60 = 18,123.20 : x
  2. Step 2: Convert to fraction form
    64,870.40/97,305.60 = 18,123.20/x
  3. Step 3: Cross multiply
    64,870.40x = 97,305.60 × 18,123.20
  4. Step 4: Simplify right side
    64,870.40x = 1,763,488,849.92
  5. Step 5: Solve for x
    x = 1,763,488,849.92/64,870.40
  6. Step 6: Final answer
    x = 27,184.80

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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.