Home / 128,742,612.20-193,337,867.10-68,276,436.20

Finding the Fourth Proportional to 128,742,612.20, 193,337,867.10 and 68,276,436.20

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Solution

The fourth proportional to 128,742,612.20, 193,337,867.10 and 68,276,436.20 is: 102,533,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,742,612.20 : 193,337,867.10 = 68,276,436.20 : x
  2. Step 2: Convert to fraction form
    128,742,612.20/193,337,867.10 = 68,276,436.20/x
  3. Step 3: Cross multiply
    128,742,612.20x = 193,337,867.10 × 68,276,436.20
  4. Step 4: Simplify right side
    128,742,612.20x = 13,200,420,548,097,230
  5. Step 5: Solve for x
    x = 13,200,420,548,097,230/128,742,612.20
  6. Step 6: Final answer
    x = 102,533,421.70

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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.