Home / 85,968,001.20-128,952,001.80-55,356,999.60

Finding the Fourth Proportional to 85,968,001.20, 128,952,001.80 and 55,356,999.60

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Solution

The fourth proportional to 85,968,001.20, 128,952,001.80 and 55,356,999.60 is: 83,035,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,001.20 : 128,952,001.80 = 55,356,999.60 : x
  2. Step 2: Convert to fraction form
    85,968,001.20/128,952,001.80 = 55,356,999.60/x
  3. Step 3: Cross multiply
    85,968,001.20x = 128,952,001.80 × 55,356,999.60
  4. Step 4: Simplify right side
    85,968,001.20x = 7,138,395,912,061,799
  5. Step 5: Solve for x
    x = 7,138,395,912,061,799/85,968,001.20
  6. Step 6: Final answer
    x = 83,035,499.40

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1.5x scale

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.