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Finding the Fourth Proportional to 163,806.70, 245,710.05 and 80,862.70

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Solution

The fourth proportional to 163,806.70, 245,710.05 and 80,862.70 is: 121,294.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,806.70 : 245,710.05 = 80,862.70 : x
  2. Step 2: Convert to fraction form
    163,806.70/245,710.05 = 80,862.70/x
  3. Step 3: Cross multiply
    163,806.70x = 245,710.05 × 80,862.70
  4. Step 4: Simplify right side
    163,806.70x = 19,868,778,060.14
  5. Step 5: Solve for x
    x = 19,868,778,060.14/163,806.70
  6. Step 6: Final answer
    x = 121,294.05

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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.