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Finding the Fourth Proportional to 153,079.38, 211,410.95 and 136,381.68

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Solution

The fourth proportional to 153,079.38, 211,410.95 and 136,381.68 is: 188,350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,079.38 : 211,410.95 = 136,381.68 : x
  2. Step 2: Convert to fraction form
    153,079.38/211,410.95 = 136,381.68/x
  3. Step 3: Cross multiply
    153,079.38x = 211,410.95 × 136,381.68
  4. Step 4: Simplify right side
    153,079.38x = 28,832,579,849.49
  5. Step 5: Solve for x
    x = 28,832,579,849.49/153,079.38
  6. Step 6: Final answer
    x = 188,350.51

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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.