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Finding the Fourth Proportional to 104,978,812.60, 157,468,218.90 and 90,366,153.40

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Solution

The fourth proportional to 104,978,812.60, 157,468,218.90 and 90,366,153.40 is: 135,549,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,978,812.60 : 157,468,218.90 = 90,366,153.40 : x
  2. Step 2: Convert to fraction form
    104,978,812.60/157,468,218.90 = 90,366,153.40/x
  3. Step 3: Cross multiply
    104,978,812.60x = 157,468,218.90 × 90,366,153.40
  4. Step 4: Simplify right side
    104,978,812.60x = 14,229,797,224,742,180
  5. Step 5: Solve for x
    x = 14,229,797,224,742,180/104,978,812.60
  6. Step 6: Final answer
    x = 135,549,230.10

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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.