Home / 105,116.13-145,038.08-66,861.75

Finding the Fourth Proportional to 105,116.13, 145,038.08 and 66,861.75

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Solution

The fourth proportional to 105,116.13, 145,038.08 and 66,861.75 is: 92,255.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,116.13 : 145,038.08 = 66,861.75 : x
  2. Step 2: Convert to fraction form
    105,116.13/145,038.08 = 66,861.75/x
  3. Step 3: Cross multiply
    105,116.13x = 145,038.08 × 66,861.75
  4. Step 4: Simplify right side
    105,116.13x = 9,697,500,012.59
  5. Step 5: Solve for x
    x = 9,697,500,012.59/105,116.13
  6. Step 6: Final answer
    x = 92,255.11

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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.