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Finding the Fourth Proportional to 139,718.40, 209,664 and 56,613.12

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Solution

The fourth proportional to 139,718.40, 209,664 and 56,613.12 is: 84,954.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.40 : 209,664 = 56,613.12 : x
  2. Step 2: Convert to fraction form
    139,718.40/209,664 = 56,613.12/x
  3. Step 3: Cross multiply
    139,718.40x = 209,664 × 56,613.12
  4. Step 4: Simplify right side
    139,718.40x = 11,869,733,191.68
  5. Step 5: Solve for x
    x = 11,869,733,191.68/139,718.40
  6. Step 6: Final answer
    x = 84,954.69

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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.