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Finding the Fourth Proportional to 315,489,129.90, 435,366,978.38 and 176,260,937.30

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Solution

The fourth proportional to 315,489,129.90, 435,366,978.38 and 176,260,937.30 is: 243,235,612.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,489,129.90 : 435,366,978.38 = 176,260,937.30 : x
  2. Step 2: Convert to fraction form
    315,489,129.90/435,366,978.38 = 176,260,937.30/x
  3. Step 3: Cross multiply
    315,489,129.90x = 435,366,978.38 × 176,260,937.30
  4. Step 4: Simplify right side
    315,489,129.90x = 76,738,191,678,727,632
  5. Step 5: Solve for x
    x = 76,738,191,678,727,632/315,489,129.90
  6. Step 6: Final answer
    x = 243,235,612.28

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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.