Home / 85,978,077.32-128,943,176.02-28,474,832.32

Finding the Fourth Proportional to 85,978,077.32, 128,943,176.02 and 28,474,832.32

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Solution

The fourth proportional to 85,978,077.32, 128,943,176.02 and 28,474,832.32 is: 42,704,319.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,978,077.32 : 128,943,176.02 = 28,474,832.32 : x
  2. Step 2: Convert to fraction form
    85,978,077.32/128,943,176.02 = 28,474,832.32/x
  3. Step 3: Cross multiply
    85,978,077.32x = 128,943,176.02 × 28,474,832.32
  4. Step 4: Simplify right side
    85,978,077.32x = 3,671,635,315,977,745
  5. Step 5: Solve for x
    x = 3,671,635,315,977,745/85,978,077.32
  6. Step 6: Final answer
    x = 42,704,319.87

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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.