Home / 85,603,638.72-128,378,485.02-28,082,506.08

Finding the Fourth Proportional to 85,603,638.72, 128,378,485.02 and 28,082,506.08

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Solution

The fourth proportional to 85,603,638.72, 128,378,485.02 and 28,082,506.08 is: 42,114,910.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603,638.72 : 128,378,485.02 = 28,082,506.08 : x
  2. Step 2: Convert to fraction form
    85,603,638.72/128,378,485.02 = 28,082,506.08/x
  3. Step 3: Cross multiply
    85,603,638.72x = 128,378,485.02 × 28,082,506.08
  4. Step 4: Simplify right side
    85,603,638.72x = 3,605,189,586,115,338.50
  5. Step 5: Solve for x
    x = 3,605,189,586,115,338.50/85,603,638.72
  6. Step 6: Final answer
    x = 42,114,910.53

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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.