Home / 128,742,021.20-193,336,980.60-68,275,845.20

Finding the Fourth Proportional to 128,742,021.20, 193,336,980.60 and 68,275,845.20

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Solution

The fourth proportional to 128,742,021.20, 193,336,980.60 and 68,275,845.20 is: 102,532,534.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,742,021.20 : 193,336,980.60 = 68,275,845.20 : x
  2. Step 2: Convert to fraction form
    128,742,021.20/193,336,980.60 = 68,275,845.20/x
  3. Step 3: Cross multiply
    128,742,021.20x = 193,336,980.60 × 68,275,845.20
  4. Step 4: Simplify right side
    128,742,021.20x = 13,200,245,758,881,004
  5. Step 5: Solve for x
    x = 13,200,245,758,881,004/128,742,021.20
  6. Step 6: Final answer
    x = 102,532,534.72

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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.