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Finding the Fourth Proportional to 153,879.85, 212,354.76 and 85,895.61

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Solution

The fourth proportional to 153,879.85, 212,354.76 and 85,895.61 is: 118,536.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,879.85 : 212,354.76 = 85,895.61 : x
  2. Step 2: Convert to fraction form
    153,879.85/212,354.76 = 85,895.61/x
  3. Step 3: Cross multiply
    153,879.85x = 212,354.76 × 85,895.61
  4. Step 4: Simplify right side
    153,879.85x = 18,240,341,172.38
  5. Step 5: Solve for x
    x = 18,240,341,172.38/153,879.85
  6. Step 6: Final answer
    x = 118,536.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.