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Finding the Fourth Proportional to 93,239.66, 128,680.02 and 56,939.10

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Solution

The fourth proportional to 93,239.66, 128,680.02 and 56,939.10 is: 78,581.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,239.66 : 128,680.02 = 56,939.10 : x
  2. Step 2: Convert to fraction form
    93,239.66/128,680.02 = 56,939.10/x
  3. Step 3: Cross multiply
    93,239.66x = 128,680.02 × 56,939.10
  4. Step 4: Simplify right side
    93,239.66x = 7,326,924,526.78
  5. Step 5: Solve for x
    x = 7,326,924,526.78/93,239.66
  6. Step 6: Final answer
    x = 78,581.63

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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.