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Finding the Fourth Proportional to 139,582.80, 209,309.40 and 60,656.40

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Solution

The fourth proportional to 139,582.80, 209,309.40 and 60,656.40 is: 90,956.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,582.80 : 209,309.40 = 60,656.40 : x
  2. Step 2: Convert to fraction form
    139,582.80/209,309.40 = 60,656.40/x
  3. Step 3: Cross multiply
    139,582.80x = 209,309.40 × 60,656.40
  4. Step 4: Simplify right side
    139,582.80x = 12,695,954,690.16
  5. Step 5: Solve for x
    x = 12,695,954,690.16/139,582.80
  6. Step 6: Final answer
    x = 90,956.44

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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.