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Finding the Fourth Proportional to 103,613.88, 142,986.90 and 58,291.89

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Solution

The fourth proportional to 103,613.88, 142,986.90 and 58,291.89 is: 80,442.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,613.88 : 142,986.90 = 58,291.89 : x
  2. Step 2: Convert to fraction form
    103,613.88/142,986.90 = 58,291.89/x
  3. Step 3: Cross multiply
    103,613.88x = 142,986.90 × 58,291.89
  4. Step 4: Simplify right side
    103,613.88x = 8,334,976,646.24
  5. Step 5: Solve for x
    x = 8,334,976,646.24/103,613.88
  6. Step 6: Final answer
    x = 80,442.67

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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.