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Finding the Fourth Proportional to 64,631.70, 89,196.93 and 48,690.90

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Solution

The fourth proportional to 64,631.70, 89,196.93 and 48,690.90 is: 67,197.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,631.70 : 89,196.93 = 48,690.90 : x
  2. Step 2: Convert to fraction form
    64,631.70/89,196.93 = 48,690.90/x
  3. Step 3: Cross multiply
    64,631.70x = 89,196.93 × 48,690.90
  4. Step 4: Simplify right side
    64,631.70x = 4,343,078,798.94
  5. Step 5: Solve for x
    x = 4,343,078,798.94/64,631.70
  6. Step 6: Final answer
    x = 67,197.35

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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.