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Finding the Fourth Proportional to 93,249.77, 128,646.16 and 64,971.86

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Solution

The fourth proportional to 93,249.77, 128,646.16 and 64,971.86 is: 89,634.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,249.77 : 128,646.16 = 64,971.86 : x
  2. Step 2: Convert to fraction form
    93,249.77/128,646.16 = 64,971.86/x
  3. Step 3: Cross multiply
    93,249.77x = 128,646.16 × 64,971.86
  4. Step 4: Simplify right side
    93,249.77x = 8,358,379,491.40
  5. Step 5: Solve for x
    x = 8,358,379,491.40/93,249.77
  6. Step 6: Final answer
    x = 89,634.32

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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.