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Finding the Fourth Proportional to 93,534.88, 128,979.84 and 61,663

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Solution

The fourth proportional to 93,534.88, 128,979.84 and 61,663 is: 85,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,534.88 : 128,979.84 = 61,663 : x
  2. Step 2: Convert to fraction form
    93,534.88/128,979.84 = 61,663/x
  3. Step 3: Cross multiply
    93,534.88x = 128,979.84 × 61,663
  4. Step 4: Simplify right side
    93,534.88x = 7,953,283,873.92
  5. Step 5: Solve for x
    x = 7,953,283,873.92/93,534.88
  6. Step 6: Final answer
    x = 85,030.14

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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.