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Finding the Fourth Proportional to 139,646.16, 192,713.04 and 79,214.76

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Solution

The fourth proportional to 139,646.16, 192,713.04 and 79,214.76 is: 109,317.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,646.16 : 192,713.04 = 79,214.76 : x
  2. Step 2: Convert to fraction form
    139,646.16/192,713.04 = 79,214.76/x
  3. Step 3: Cross multiply
    139,646.16x = 192,713.04 × 79,214.76
  4. Step 4: Simplify right side
    139,646.16x = 15,265,717,212.47
  5. Step 5: Solve for x
    x = 15,265,717,212.47/139,646.16
  6. Step 6: Final answer
    x = 109,317.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.