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Finding the Fourth Proportional to 139,583.80, 209,310.90 and 60,657.40

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Solution

The fourth proportional to 139,583.80, 209,310.90 and 60,657.40 is: 90,957.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,583.80 : 209,310.90 = 60,657.40 : x
  2. Step 2: Convert to fraction form
    139,583.80/209,310.90 = 60,657.40/x
  3. Step 3: Cross multiply
    139,583.80x = 209,310.90 × 60,657.40
  4. Step 4: Simplify right side
    139,583.80x = 12,696,254,985.66
  5. Step 5: Solve for x
    x = 12,696,254,985.66/139,583.80
  6. Step 6: Final answer
    x = 90,957.94

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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.