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Finding the Fourth Proportional to 93,078, 128,437.92 and 52,778.88

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Solution

The fourth proportional to 93,078, 128,437.92 and 52,778.88 is: 72,829.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,078 : 128,437.92 = 52,778.88 : x
  2. Step 2: Convert to fraction form
    93,078/128,437.92 = 52,778.88/x
  3. Step 3: Cross multiply
    93,078x = 128,437.92 × 52,778.88
  4. Step 4: Simplify right side
    93,078x = 6,778,809,567.13
  5. Step 5: Solve for x
    x = 6,778,809,567.13/93,078
  6. Step 6: Final answer
    x = 72,829.34

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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.