Home / 128,672,889.29-177,570,385.53-69,935,536.79

Finding the Fourth Proportional to 128,672,889.29, 177,570,385.53 and 69,935,536.79

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Solution

The fourth proportional to 128,672,889.29, 177,570,385.53 and 69,935,536.79 is: 96,512,018.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,672,889.29 : 177,570,385.53 = 69,935,536.79 : x
  2. Step 2: Convert to fraction form
    128,672,889.29/177,570,385.53 = 69,935,536.79/x
  3. Step 3: Cross multiply
    128,672,889.29x = 177,570,385.53 × 69,935,536.79
  4. Step 4: Simplify right side
    128,672,889.29x = 12,418,480,230,562,412
  5. Step 5: Solve for x
    x = 12,418,480,230,562,412/128,672,889.29
  6. Step 6: Final answer
    x = 96,512,018.18

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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.