Home / 70,420,009.20-105,630,013.80-53,413,897.20

Finding the Fourth Proportional to 70,420,009.20, 105,630,013.80 and 53,413,897.20

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Solution

The fourth proportional to 70,420,009.20, 105,630,013.80 and 53,413,897.20 is: 80,120,845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,420,009.20 : 105,630,013.80 = 53,413,897.20 : x
  2. Step 2: Convert to fraction form
    70,420,009.20/105,630,013.80 = 53,413,897.20/x
  3. Step 3: Cross multiply
    70,420,009.20x = 105,630,013.80 × 53,413,897.20
  4. Step 4: Simplify right side
    70,420,009.20x = 5,642,110,698,347,782
  5. Step 5: Solve for x
    x = 5,642,110,698,347,782/70,420,009.20
  6. Step 6: Final answer
    x = 80,120,845.80

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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.