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Finding the Fourth Proportional to 265,326,492.90, 397,989,739.35 and 81,093,612.90

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Solution

The fourth proportional to 265,326,492.90, 397,989,739.35 and 81,093,612.90 is: 121,640,419.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,326,492.90 : 397,989,739.35 = 81,093,612.90 : x
  2. Step 2: Convert to fraction form
    265,326,492.90/397,989,739.35 = 81,093,612.90/x
  3. Step 3: Cross multiply
    265,326,492.90x = 397,989,739.35 × 81,093,612.90
  4. Step 4: Simplify right side
    265,326,492.90x = 32,274,425,861,020,800
  5. Step 5: Solve for x
    x = 32,274,425,861,020,800/265,326,492.90
  6. Step 6: Final answer
    x = 121,640,419.35

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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.