Home / 122,799,988.34-169,540,463.04-78,171,141.57

Finding the Fourth Proportional to 122,799,988.34, 169,540,463.04 and 78,171,141.57

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Solution

The fourth proportional to 122,799,988.34, 169,540,463.04 and 78,171,141.57 is: 107,924,859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,799,988.34 : 169,540,463.04 = 78,171,141.57 : x
  2. Step 2: Convert to fraction form
    122,799,988.34/169,540,463.04 = 78,171,141.57/x
  3. Step 3: Cross multiply
    122,799,988.34x = 169,540,463.04 × 78,171,141.57
  4. Step 4: Simplify right side
    122,799,988.34x = 13,253,171,538,168,786
  5. Step 5: Solve for x
    x = 13,253,171,538,168,786/122,799,988.34
  6. Step 6: Final answer
    x = 107,924,859.91

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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.