Home / 128,343,347.58-177,136,459.06-76,161,155.78

Finding the Fourth Proportional to 128,343,347.58, 177,136,459.06 and 76,161,155.78

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Solution

The fourth proportional to 128,343,347.58, 177,136,459.06 and 76,161,155.78 is: 105,115,829.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,343,347.58 : 177,136,459.06 = 76,161,155.78 : x
  2. Step 2: Convert to fraction form
    128,343,347.58/177,136,459.06 = 76,161,155.78/x
  3. Step 3: Cross multiply
    128,343,347.58x = 177,136,459.06 × 76,161,155.78
  4. Step 4: Simplify right side
    128,343,347.58x = 13,490,917,452,786,252
  5. Step 5: Solve for x
    x = 13,490,917,452,786,252/128,343,347.58
  6. Step 6: Final answer
    x = 105,115,829.59

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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.