Home / 85,542,002.10-128,313,003.15-28,020,402.90

Finding the Fourth Proportional to 85,542,002.10, 128,313,003.15 and 28,020,402.90

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Solution

The fourth proportional to 85,542,002.10, 128,313,003.15 and 28,020,402.90 is: 42,030,604.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,542,002.10 : 128,313,003.15 = 28,020,402.90 : x
  2. Step 2: Convert to fraction form
    85,542,002.10/128,313,003.15 = 28,020,402.90/x
  3. Step 3: Cross multiply
    85,542,002.10x = 128,313,003.15 × 28,020,402.90
  4. Step 4: Simplify right side
    85,542,002.10x = 3,595,382,045,571,969
  5. Step 5: Solve for x
    x = 3,595,382,045,571,969/85,542,002.10
  6. Step 6: Final answer
    x = 42,030,604.35

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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.