Home / 145,967,728.46-201,435,999.09-78,986,687.15

Finding the Fourth Proportional to 145,967,728.46, 201,435,999.09 and 78,986,687.15

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Solution

The fourth proportional to 145,967,728.46, 201,435,999.09 and 78,986,687.15 is: 109,001,917.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,967,728.46 : 201,435,999.09 = 78,986,687.15 : x
  2. Step 2: Convert to fraction form
    145,967,728.46/201,435,999.09 = 78,986,687.15/x
  3. Step 3: Cross multiply
    145,967,728.46x = 201,435,999.09 × 78,986,687.15
  4. Step 4: Simplify right side
    145,967,728.46x = 15,910,762,240,869,516
  5. Step 5: Solve for x
    x = 15,910,762,240,869,516/145,967,728.46
  6. Step 6: Final answer
    x = 109,001,917.13

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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.