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Finding the Fourth Proportional to 189,363.70, 261,350.22 and 121,457.26

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Solution

The fourth proportional to 189,363.70, 261,350.22 and 121,457.26 is: 167,629.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,363.70 : 261,350.22 = 121,457.26 : x
  2. Step 2: Convert to fraction form
    189,363.70/261,350.22 = 121,457.26/x
  3. Step 3: Cross multiply
    189,363.70x = 261,350.22 × 121,457.26
  4. Step 4: Simplify right side
    189,363.70x = 31,742,881,621.60
  5. Step 5: Solve for x
    x = 31,742,881,621.60/189,363.70
  6. Step 6: Final answer
    x = 167,629.18

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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.