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Finding the Fourth Proportional to 168,381,607.60, 252,784,987.80 and 90,720,362.80

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Solution

The fourth proportional to 168,381,607.60, 252,784,987.80 and 90,720,362.80 is: 136,195,075.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,381,607.60 : 252,784,987.80 = 90,720,362.80 : x
  2. Step 2: Convert to fraction form
    168,381,607.60/252,784,987.80 = 90,720,362.80/x
  3. Step 3: Cross multiply
    168,381,607.60x = 252,784,987.80 × 90,720,362.80
  4. Step 4: Simplify right side
    168,381,607.60x = 22,932,745,803,609,576
  5. Step 5: Solve for x
    x = 22,932,745,803,609,576/168,381,607.60
  6. Step 6: Final answer
    x = 136,195,075.76

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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.