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Finding the Fourth Proportional to 93,431.98, 128,939.14 and 53,144.71

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Solution

The fourth proportional to 93,431.98, 128,939.14 and 53,144.71 is: 73,341.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,431.98 : 128,939.14 = 53,144.71 : x
  2. Step 2: Convert to fraction form
    93,431.98/128,939.14 = 53,144.71/x
  3. Step 3: Cross multiply
    93,431.98x = 128,939.14 × 53,144.71
  4. Step 4: Simplify right side
    93,431.98x = 6,852,432,947.03
  5. Step 5: Solve for x
    x = 6,852,432,947.03/93,431.98
  6. Step 6: Final answer
    x = 73,341.41

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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.