Home / 128,755,894.36-177,680,670.78-70,809,142.36

Finding the Fourth Proportional to 128,755,894.36, 177,680,670.78 and 70,809,142.36

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Solution

The fourth proportional to 128,755,894.36, 177,680,670.78 and 70,809,142.36 is: 97,715,261.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,755,894.36 : 177,680,670.78 = 70,809,142.36 : x
  2. Step 2: Convert to fraction form
    128,755,894.36/177,680,670.78 = 70,809,142.36/x
  3. Step 3: Cross multiply
    128,755,894.36x = 177,680,670.78 × 70,809,142.36
  4. Step 4: Simplify right side
    128,755,894.36x = 12,581,415,911,881,312
  5. Step 5: Solve for x
    x = 12,581,415,911,881,312/128,755,894.36
  6. Step 6: Final answer
    x = 97,715,261.69

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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.