Home / 8,720,801.70-13,088,978.55-5,122,068.90

Finding the Fourth Proportional to 8,720,801.70, 13,088,978.55 and 5,122,068.90

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Solution

The fourth proportional to 8,720,801.70, 13,088,978.55 and 5,122,068.90 is: 7,687,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720,801.70 : 13,088,978.55 = 5,122,068.90 : x
  2. Step 2: Convert to fraction form
    8,720,801.70/13,088,978.55 = 5,122,068.90/x
  3. Step 3: Cross multiply
    8,720,801.70x = 13,088,978.55 × 5,122,068.90
  4. Step 4: Simplify right side
    8,720,801.70x = 67,042,649,963,722.10
  5. Step 5: Solve for x
    x = 67,042,649,963,722.10/8,720,801.70
  6. Step 6: Final answer
    x = 7,687,670.50

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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.