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Finding the Fourth Proportional to 64,894.50, 89,473.28 and 54,154.85

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Solution

The fourth proportional to 64,894.50, 89,473.28 and 54,154.85 is: 74,665.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,894.50 : 89,473.28 = 54,154.85 : x
  2. Step 2: Convert to fraction form
    64,894.50/89,473.28 = 54,154.85/x
  3. Step 3: Cross multiply
    64,894.50x = 89,473.28 × 54,154.85
  4. Step 4: Simplify right side
    64,894.50x = 4,845,411,339.27
  5. Step 5: Solve for x
    x = 4,845,411,339.27/64,894.50
  6. Step 6: Final answer
    x = 74,665.98

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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.