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Finding the Fourth Proportional to 99,173.72, 148,506.60 and 54,751.16

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Solution

The fourth proportional to 99,173.72, 148,506.60 and 54,751.16 is: 81,986.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,173.72 : 148,506.60 = 54,751.16 : x
  2. Step 2: Convert to fraction form
    99,173.72/148,506.60 = 54,751.16/x
  3. Step 3: Cross multiply
    99,173.72x = 148,506.60 × 54,751.16
  4. Step 4: Simplify right side
    99,173.72x = 8,130,908,617.66
  5. Step 5: Solve for x
    x = 8,130,908,617.66/99,173.72
  6. Step 6: Final answer
    x = 81,986.52

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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.