Home / 128,158,842.42-176,860,051.68-69,421,507.56

Finding the Fourth Proportional to 128,158,842.42, 176,860,051.68 and 69,421,507.56

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Solution

The fourth proportional to 128,158,842.42, 176,860,051.68 and 69,421,507.56 is: 95,802,140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,158,842.42 : 176,860,051.68 = 69,421,507.56 : x
  2. Step 2: Convert to fraction form
    128,158,842.42/176,860,051.68 = 69,421,507.56/x
  3. Step 3: Cross multiply
    128,158,842.42x = 176,860,051.68 × 69,421,507.56
  4. Step 4: Simplify right side
    128,158,842.42x = 12,277,891,414,765,112
  5. Step 5: Solve for x
    x = 12,277,891,414,765,112/128,158,842.42
  6. Step 6: Final answer
    x = 95,802,140.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.