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Finding the Fourth Proportional to 153,790.58, 212,335.94 and 99,474.41

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Solution

The fourth proportional to 153,790.58, 212,335.94 and 99,474.41 is: 137,342.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,790.58 : 212,335.94 = 99,474.41 : x
  2. Step 2: Convert to fraction form
    153,790.58/212,335.94 = 99,474.41/x
  3. Step 3: Cross multiply
    153,790.58x = 212,335.94 × 99,474.41
  4. Step 4: Simplify right side
    153,790.58x = 21,121,992,386.76
  5. Step 5: Solve for x
    x = 21,121,992,386.76/153,790.58
  6. Step 6: Final answer
    x = 137,342.56

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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.