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Finding the Fourth Proportional to 117,903,978.20, 176,688,005.70 and 86,957,053.40

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Solution

The fourth proportional to 117,903,978.20, 176,688,005.70 and 86,957,053.40 is: 130,311,704.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,903,978.20 : 176,688,005.70 = 86,957,053.40 : x
  2. Step 2: Convert to fraction form
    117,903,978.20/176,688,005.70 = 86,957,053.40/x
  3. Step 3: Cross multiply
    117,903,978.20x = 176,688,005.70 × 86,957,053.40
  4. Step 4: Simplify right side
    117,903,978.20x = 15,364,268,346,794,404
  5. Step 5: Solve for x
    x = 15,364,268,346,794,404/117,903,978.20
  6. Step 6: Final answer
    x = 130,311,704.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.