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Finding the Fourth Proportional to 163,920.40, 245,807.70 and 75,201.10

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Solution

The fourth proportional to 163,920.40, 245,807.70 and 75,201.10 is: 112,768.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,920.40 : 245,807.70 = 75,201.10 : x
  2. Step 2: Convert to fraction form
    163,920.40/245,807.70 = 75,201.10/x
  3. Step 3: Cross multiply
    163,920.40x = 245,807.70 × 75,201.10
  4. Step 4: Simplify right side
    163,920.40x = 18,485,009,428.47
  5. Step 5: Solve for x
    x = 18,485,009,428.47/163,920.40
  6. Step 6: Final answer
    x = 112,768.21

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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.