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Finding the Fourth Proportional to 93,254.78, 128,653.06 and 64,976.86

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Solution

The fourth proportional to 93,254.78, 128,653.06 and 64,976.86 is: 89,641.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,254.78 : 128,653.06 = 64,976.86 : x
  2. Step 2: Convert to fraction form
    93,254.78/128,653.06 = 64,976.86/x
  3. Step 3: Cross multiply
    93,254.78x = 128,653.06 × 64,976.86
  4. Step 4: Simplify right side
    93,254.78x = 8,359,471,868.19
  5. Step 5: Solve for x
    x = 8,359,471,868.19/93,254.78
  6. Step 6: Final answer
    x = 89,641.22

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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.