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Finding the Fourth Proportional to 140,978,272.95, 211,467,118.65 and 79,539,541.40

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Solution

The fourth proportional to 140,978,272.95, 211,467,118.65 and 79,539,541.40 is: 119,309,148.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,978,272.95 : 211,467,118.65 = 79,539,541.40 : x
  2. Step 2: Convert to fraction form
    140,978,272.95/211,467,118.65 = 79,539,541.40/x
  3. Step 3: Cross multiply
    140,978,272.95x = 211,467,118.65 × 79,539,541.40
  4. Step 4: Simplify right side
    140,978,272.95x = 16,819,997,637,543,052
  5. Step 5: Solve for x
    x = 16,819,997,637,543,052/140,978,272.95
  6. Step 6: Final answer
    x = 119,309,148.04

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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.