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Finding the Fourth Proportional to 105,661.92, 145,805.12 and 60,941.28

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Solution

The fourth proportional to 105,661.92, 145,805.12 and 60,941.28 is: 84,094.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,661.92 : 145,805.12 = 60,941.28 : x
  2. Step 2: Convert to fraction form
    105,661.92/145,805.12 = 60,941.28/x
  3. Step 3: Cross multiply
    105,661.92x = 145,805.12 × 60,941.28
  4. Step 4: Simplify right side
    105,661.92x = 8,885,550,643.35
  5. Step 5: Solve for x
    x = 8,885,550,643.35/105,661.92
  6. Step 6: Final answer
    x = 84,094.16

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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.