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Finding the Fourth Proportional to 210,510.84, 290,633.69 and 136,993.32

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Solution

The fourth proportional to 210,510.84, 290,633.69 and 136,993.32 is: 189,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,510.84 : 290,633.69 = 136,993.32 : x
  2. Step 2: Convert to fraction form
    210,510.84/290,633.69 = 136,993.32/x
  3. Step 3: Cross multiply
    210,510.84x = 290,633.69 × 136,993.32
  4. Step 4: Simplify right side
    210,510.84x = 39,814,873,267.34
  5. Step 5: Solve for x
    x = 39,814,873,267.34/210,510.84
  6. Step 6: Final answer
    x = 189,134.55

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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.