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Finding the Fourth Proportional to 101,309.60, 139,812.60 and 61,036.04

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Solution

The fourth proportional to 101,309.60, 139,812.60 and 61,036.04 is: 84,232.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,309.60 : 139,812.60 = 61,036.04 : x
  2. Step 2: Convert to fraction form
    101,309.60/139,812.60 = 61,036.04/x
  3. Step 3: Cross multiply
    101,309.60x = 139,812.60 × 61,036.04
  4. Step 4: Simplify right side
    101,309.60x = 8,533,607,446.10
  5. Step 5: Solve for x
    x = 8,533,607,446.10/101,309.60
  6. Step 6: Final answer
    x = 84,232.96

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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.