Home / 128,460,609.48-177,278,284.08-72,706,025.82

Finding the Fourth Proportional to 128,460,609.48, 177,278,284.08 and 72,706,025.82

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Solution

The fourth proportional to 128,460,609.48, 177,278,284.08 and 72,706,025.82 is: 100,335,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,460,609.48 : 177,278,284.08 = 72,706,025.82 : x
  2. Step 2: Convert to fraction form
    128,460,609.48/177,278,284.08 = 72,706,025.82/x
  3. Step 3: Cross multiply
    128,460,609.48x = 177,278,284.08 × 72,706,025.82
  4. Step 4: Simplify right side
    128,460,609.48x = 12,889,199,499,645,774
  5. Step 5: Solve for x
    x = 12,889,199,499,645,774/128,460,609.48
  6. Step 6: Final answer
    x = 100,335,811.51

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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.