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Finding the Fourth Proportional to 139,659,975.68, 209,477,038.56 and 65,866,833.92

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Solution

The fourth proportional to 139,659,975.68, 209,477,038.56 and 65,866,833.92 is: 98,794,155.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,659,975.68 : 209,477,038.56 = 65,866,833.92 : x
  2. Step 2: Convert to fraction form
    139,659,975.68/209,477,038.56 = 65,866,833.92/x
  3. Step 3: Cross multiply
    139,659,975.68x = 209,477,038.56 × 65,866,833.92
  4. Step 4: Simplify right side
    139,659,975.68x = 13,797,589,308,884,956
  5. Step 5: Solve for x
    x = 13,797,589,308,884,956/139,659,975.68
  6. Step 6: Final answer
    x = 98,794,155.17

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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.