Home / 128,310,643.96-177,072,170.37-72,564,400.61

Finding the Fourth Proportional to 128,310,643.96, 177,072,170.37 and 72,564,400.61

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Solution

The fourth proportional to 128,310,643.96, 177,072,170.37 and 72,564,400.61 is: 100,140,841.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310,643.96 : 177,072,170.37 = 72,564,400.61 : x
  2. Step 2: Convert to fraction form
    128,310,643.96/177,072,170.37 = 72,564,400.61/x
  3. Step 3: Cross multiply
    128,310,643.96x = 177,072,170.37 × 72,564,400.61
  4. Step 4: Simplify right side
    128,310,643.96x = 12,849,135,906,725,492
  5. Step 5: Solve for x
    x = 12,849,135,906,725,492/128,310,643.96
  6. Step 6: Final answer
    x = 100,140,841.87

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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.