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Finding the Fourth Proportional to 273,943,015.96, 411,055,798.76 and 128,391,364.40

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Solution

The fourth proportional to 273,943,015.96, 411,055,798.76 and 128,391,364.40 is: 192,653,259.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,943,015.96 : 411,055,798.76 = 128,391,364.40 : x
  2. Step 2: Convert to fraction form
    273,943,015.96/411,055,798.76 = 128,391,364.40/x
  3. Step 3: Cross multiply
    273,943,015.96x = 411,055,798.76 × 128,391,364.40
  4. Step 4: Simplify right side
    273,943,015.96x = 52,776,014,847,328,232
  5. Step 5: Solve for x
    x = 52,776,014,847,328,232/273,943,015.96
  6. Step 6: Final answer
    x = 192,653,259.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.