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Finding the Fourth Proportional to 136,988,787.16, 205,451,737.08 and 81,672,274.45

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Solution

The fourth proportional to 136,988,787.16, 205,451,737.08 and 81,672,274.45 is: 122,489,665.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,988,787.16 : 205,451,737.08 = 81,672,274.45 : x
  2. Step 2: Convert to fraction form
    136,988,787.16/205,451,737.08 = 81,672,274.45/x
  3. Step 3: Cross multiply
    136,988,787.16x = 205,451,737.08 × 81,672,274.45
  4. Step 4: Simplify right side
    136,988,787.16x = 16,779,710,657,027,004
  5. Step 5: Solve for x
    x = 16,779,710,657,027,004/136,988,787.16
  6. Step 6: Final answer
    x = 122,489,665.07

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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.