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Finding the Fourth Proportional to 163,931.70, 245,897.55 and 85,199.70

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Solution

The fourth proportional to 163,931.70, 245,897.55 and 85,199.70 is: 127,799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,931.70 : 245,897.55 = 85,199.70 : x
  2. Step 2: Convert to fraction form
    163,931.70/245,897.55 = 85,199.70/x
  3. Step 3: Cross multiply
    163,931.70x = 245,897.55 × 85,199.70
  4. Step 4: Simplify right side
    163,931.70x = 20,950,397,490.74
  5. Step 5: Solve for x
    x = 20,950,397,490.74/163,931.70
  6. Step 6: Final answer
    x = 127,799.55

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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.