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Finding the Fourth Proportional to 93,364.80, 139,901.40 and 78,493.20

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Solution

The fourth proportional to 93,364.80, 139,901.40 and 78,493.20 is: 117,617.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,364.80 : 139,901.40 = 78,493.20 : x
  2. Step 2: Convert to fraction form
    93,364.80/139,901.40 = 78,493.20/x
  3. Step 3: Cross multiply
    93,364.80x = 139,901.40 × 78,493.20
  4. Step 4: Simplify right side
    93,364.80x = 10,981,308,570.48
  5. Step 5: Solve for x
    x = 10,981,308,570.48/93,364.80
  6. Step 6: Final answer
    x = 117,617.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.