Home / 85,415,999.40-127,825,400.70-78,249,637.80

Finding the Fourth Proportional to 85,415,999.40, 127,825,400.70 and 78,249,637.80

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Solution

The fourth proportional to 85,415,999.40, 127,825,400.70 and 78,249,637.80 is: 117,100,910.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,415,999.40 : 127,825,400.70 = 78,249,637.80 : x
  2. Step 2: Convert to fraction form
    85,415,999.40/127,825,400.70 = 78,249,637.80/x
  3. Step 3: Cross multiply
    85,415,999.40x = 127,825,400.70 × 78,249,637.80
  4. Step 4: Simplify right side
    85,415,999.40x = 10,002,291,306,414,866
  5. Step 5: Solve for x
    x = 10,002,291,306,414,866/85,415,999.40
  6. Step 6: Final answer
    x = 117,100,910.56

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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.