Home / 136,874,250-188,839,964.52-78,094,688.40

Finding the Fourth Proportional to 136,874,250, 188,839,964.52 and 78,094,688.40

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Solution

The fourth proportional to 136,874,250, 188,839,964.52 and 78,094,688.40 is: 107,744,138.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,874,250 : 188,839,964.52 = 78,094,688.40 : x
  2. Step 2: Convert to fraction form
    136,874,250/188,839,964.52 = 78,094,688.40/x
  3. Step 3: Cross multiply
    136,874,250x = 188,839,964.52 × 78,094,688.40
  4. Step 4: Simplify right side
    136,874,250x = 14,747,398,186,656,458
  5. Step 5: Solve for x
    x = 14,747,398,186,656,458/136,874,250
  6. Step 6: Final answer
    x = 107,744,138.77

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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.