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Finding the Fourth Proportional to 103,612.54, 142,980.08 and 61,162.86

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Solution

The fourth proportional to 103,612.54, 142,980.08 and 61,162.86 is: 84,401.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.54 : 142,980.08 = 61,162.86 : x
  2. Step 2: Convert to fraction form
    103,612.54/142,980.08 = 61,162.86/x
  3. Step 3: Cross multiply
    103,612.54x = 142,980.08 × 61,162.86
  4. Step 4: Simplify right side
    103,612.54x = 8,745,070,615.83
  5. Step 5: Solve for x
    x = 8,745,070,615.83/103,612.54
  6. Step 6: Final answer
    x = 84,401.66

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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.