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Finding the Fourth Proportional to 93,131.80, 139,697.70 and 84,821.20

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Solution

The fourth proportional to 93,131.80, 139,697.70 and 84,821.20 is: 127,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,131.80 : 139,697.70 = 84,821.20 : x
  2. Step 2: Convert to fraction form
    93,131.80/139,697.70 = 84,821.20/x
  3. Step 3: Cross multiply
    93,131.80x = 139,697.70 × 84,821.20
  4. Step 4: Simplify right side
    93,131.80x = 11,849,326,551.24
  5. Step 5: Solve for x
    x = 11,849,326,551.24/93,131.80
  6. Step 6: Final answer
    x = 127,231.80

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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.