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Finding the Fourth Proportional to 93,310.65, 128,731.95 and 57,438.32

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Solution

The fourth proportional to 93,310.65, 128,731.95 and 57,438.32 is: 79,242.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,310.65 : 128,731.95 = 57,438.32 : x
  2. Step 2: Convert to fraction form
    93,310.65/128,731.95 = 57,438.32/x
  3. Step 3: Cross multiply
    93,310.65x = 128,731.95 × 57,438.32
  4. Step 4: Simplify right side
    93,310.65x = 7,394,146,294.66
  5. Step 5: Solve for x
    x = 7,394,146,294.66/93,310.65
  6. Step 6: Final answer
    x = 79,242.25

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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.