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Finding the Fourth Proportional to 99,602.78, 137,448.34 and 54,279.84

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Solution

The fourth proportional to 99,602.78, 137,448.34 and 54,279.84 is: 74,904.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,602.78 : 137,448.34 = 54,279.84 : x
  2. Step 2: Convert to fraction form
    99,602.78/137,448.34 = 54,279.84/x
  3. Step 3: Cross multiply
    99,602.78x = 137,448.34 × 54,279.84
  4. Step 4: Simplify right side
    99,602.78x = 7,460,673,903.47
  5. Step 5: Solve for x
    x = 7,460,673,903.47/99,602.78
  6. Step 6: Final answer
    x = 74,904.27

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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.