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Finding the Fourth Proportional to 99,912.99, 137,875.64 and 54,590.25

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Solution

The fourth proportional to 99,912.99, 137,875.64 and 54,590.25 is: 75,332.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,912.99 : 137,875.64 = 54,590.25 : x
  2. Step 2: Convert to fraction form
    99,912.99/137,875.64 = 54,590.25/x
  3. Step 3: Cross multiply
    99,912.99x = 137,875.64 × 54,590.25
  4. Step 4: Simplify right side
    99,912.99x = 7,526,665,656.51
  5. Step 5: Solve for x
    x = 7,526,665,656.51/99,912.99
  6. Step 6: Final answer
    x = 75,332.20

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1.5x scale

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.