Home / 112,978,861.20-169,468,291.80-87,438,200.40

Finding the Fourth Proportional to 112,978,861.20, 169,468,291.80 and 87,438,200.40

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Solution

The fourth proportional to 112,978,861.20, 169,468,291.80 and 87,438,200.40 is: 131,157,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,978,861.20 : 169,468,291.80 = 87,438,200.40 : x
  2. Step 2: Convert to fraction form
    112,978,861.20/169,468,291.80 = 87,438,200.40/x
  3. Step 3: Cross multiply
    112,978,861.20x = 169,468,291.80 × 87,438,200.40
  4. Step 4: Simplify right side
    112,978,861.20x = 14,818,002,459,854,078
  5. Step 5: Solve for x
    x = 14,818,002,459,854,078/112,978,861.20
  6. Step 6: Final answer
    x = 131,157,300.60

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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.