Home / 85,603,641.72-128,378,489.52-28,082,509.08

Finding the Fourth Proportional to 85,603,641.72, 128,378,489.52 and 28,082,509.08

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Solution

The fourth proportional to 85,603,641.72, 128,378,489.52 and 28,082,509.08 is: 42,114,915.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603,641.72 : 128,378,489.52 = 28,082,509.08 : x
  2. Step 2: Convert to fraction form
    85,603,641.72/128,378,489.52 = 28,082,509.08/x
  3. Step 3: Cross multiply
    85,603,641.72x = 128,378,489.52 × 28,082,509.08
  4. Step 4: Simplify right side
    85,603,641.72x = 3,605,190,097,622,084.50
  5. Step 5: Solve for x
    x = 3,605,190,097,622,084.50/85,603,641.72
  6. Step 6: Final answer
    x = 42,114,915.03

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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.