Home / 210,829,733.49-290,929,146.89-128,314,398.45

Finding the Fourth Proportional to 210,829,733.49, 290,929,146.89 and 128,314,398.45

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Solution

The fourth proportional to 210,829,733.49, 290,929,146.89 and 128,314,398.45 is: 177,064,201.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,829,733.49 : 290,929,146.89 = 128,314,398.45 : x
  2. Step 2: Convert to fraction form
    210,829,733.49/290,929,146.89 = 128,314,398.45/x
  3. Step 3: Cross multiply
    210,829,733.49x = 290,929,146.89 × 128,314,398.45
  4. Step 4: Simplify right side
    210,829,733.49x = 37,330,398,474,120,464
  5. Step 5: Solve for x
    x = 37,330,398,474,120,464/210,829,733.49
  6. Step 6: Final answer
    x = 177,064,201.79

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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.