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Finding the Fourth Proportional to 161,886.40, 242,829.60 and 128,425.30

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Solution

The fourth proportional to 161,886.40, 242,829.60 and 128,425.30 is: 192,637.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,886.40 : 242,829.60 = 128,425.30 : x
  2. Step 2: Convert to fraction form
    161,886.40/242,829.60 = 128,425.30/x
  3. Step 3: Cross multiply
    161,886.40x = 242,829.60 × 128,425.30
  4. Step 4: Simplify right side
    161,886.40x = 31,185,464,228.88
  5. Step 5: Solve for x
    x = 31,185,464,228.88/161,886.40
  6. Step 6: Final answer
    x = 192,637.95

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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.