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Finding the Fourth Proportional to 90,879.30, 136,312.47 and 28,567.62

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Solution

The fourth proportional to 90,879.30, 136,312.47 and 28,567.62 is: 42,849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879.30 : 136,312.47 = 28,567.62 : x
  2. Step 2: Convert to fraction form
    90,879.30/136,312.47 = 28,567.62/x
  3. Step 3: Cross multiply
    90,879.30x = 136,312.47 × 28,567.62
  4. Step 4: Simplify right side
    90,879.30x = 3,894,122,844.22
  5. Step 5: Solve for x
    x = 3,894,122,844.22/90,879.30
  6. Step 6: Final answer
    x = 42,849.39

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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.