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Finding the Fourth Proportional to 104,953.90, 157,430.85 and 91,831.90

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Solution

The fourth proportional to 104,953.90, 157,430.85 and 91,831.90 is: 137,747.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,953.90 : 157,430.85 = 91,831.90 : x
  2. Step 2: Convert to fraction form
    104,953.90/157,430.85 = 91,831.90/x
  3. Step 3: Cross multiply
    104,953.90x = 157,430.85 × 91,831.90
  4. Step 4: Simplify right side
    104,953.90x = 14,457,174,074.12
  5. Step 5: Solve for x
    x = 14,457,174,074.12/104,953.90
  6. Step 6: Final answer
    x = 137,747.85

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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.