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Finding the Fourth Proportional to 99,368.45, 137,129.45 and 54,047.48

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Solution

The fourth proportional to 99,368.45, 137,129.45 and 54,047.48 is: 74,586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,368.45 : 137,129.45 = 54,047.48 : x
  2. Step 2: Convert to fraction form
    99,368.45/137,129.45 = 54,047.48/x
  3. Step 3: Cross multiply
    99,368.45x = 137,129.45 × 54,047.48
  4. Step 4: Simplify right side
    99,368.45x = 7,411,501,278.87
  5. Step 5: Solve for x
    x = 7,411,501,278.87/99,368.45
  6. Step 6: Final answer
    x = 74,586.06

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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.