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Finding the Fourth Proportional to 149,563,435.86, 206,431,978.86 and 87,703,703.46

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Solution

The fourth proportional to 149,563,435.86, 206,431,978.86 and 87,703,703.46 is: 121,051,304.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,563,435.86 : 206,431,978.86 = 87,703,703.46 : x
  2. Step 2: Convert to fraction form
    149,563,435.86/206,431,978.86 = 87,703,703.46/x
  3. Step 3: Cross multiply
    149,563,435.86x = 206,431,978.86 × 87,703,703.46
  4. Step 4: Simplify right side
    149,563,435.86x = 18,104,849,058,598,428
  5. Step 5: Solve for x
    x = 18,104,849,058,598,428/149,563,435.86
  6. Step 6: Final answer
    x = 121,051,304.78

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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.