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Finding the Fourth Proportional to 93,486.88, 128,947.92 and 55,732

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Solution

The fourth proportional to 93,486.88, 128,947.92 and 55,732 is: 76,872.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,486.88 : 128,947.92 = 55,732 : x
  2. Step 2: Convert to fraction form
    93,486.88/128,947.92 = 55,732/x
  3. Step 3: Cross multiply
    93,486.88x = 128,947.92 × 55,732
  4. Step 4: Simplify right side
    93,486.88x = 7,186,525,477.44
  5. Step 5: Solve for x
    x = 7,186,525,477.44/93,486.88
  6. Step 6: Final answer
    x = 76,872.02

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1.5x scale

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.