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Finding the Fourth Proportional to 103,612.56, 142,985.10 and 58,290.56

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Solution

The fourth proportional to 103,612.56, 142,985.10 and 58,290.56 is: 80,440.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.56 : 142,985.10 = 58,290.56 : x
  2. Step 2: Convert to fraction form
    103,612.56/142,985.10 = 58,290.56/x
  3. Step 3: Cross multiply
    103,612.56x = 142,985.10 × 58,290.56
  4. Step 4: Simplify right side
    103,612.56x = 8,334,681,550.66
  5. Step 5: Solve for x
    x = 8,334,681,550.66/103,612.56
  6. Step 6: Final answer
    x = 80,440.84

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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.