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Finding the Fourth Proportional to 93,663.78, 129,216.78 and 61,406.13

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Solution

The fourth proportional to 93,663.78, 129,216.78 and 61,406.13 is: 84,714.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,663.78 : 129,216.78 = 61,406.13 : x
  2. Step 2: Convert to fraction form
    93,663.78/129,216.78 = 61,406.13/x
  3. Step 3: Cross multiply
    93,663.78x = 129,216.78 × 61,406.13
  4. Step 4: Simplify right side
    93,663.78x = 7,934,702,390.86
  5. Step 5: Solve for x
    x = 7,934,702,390.86/93,663.78
  6. Step 6: Final answer
    x = 84,714.74

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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.