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Finding the Fourth Proportional to 93,489.60, 129,025.81 and 57,678.69

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Solution

The fourth proportional to 93,489.60, 129,025.81 and 57,678.69 is: 79,602.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,489.60 : 129,025.81 = 57,678.69 : x
  2. Step 2: Convert to fraction form
    93,489.60/129,025.81 = 57,678.69/x
  3. Step 3: Cross multiply
    93,489.60x = 129,025.81 × 57,678.69
  4. Step 4: Simplify right side
    93,489.60x = 7,442,039,202.72
  5. Step 5: Solve for x
    x = 7,442,039,202.72/93,489.60
  6. Step 6: Final answer
    x = 79,602.86

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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.