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Finding the Fourth Proportional to 103,612.88, 142,985.54 and 58,290.88

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Solution

The fourth proportional to 103,612.88, 142,985.54 and 58,290.88 is: 80,441.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.88 : 142,985.54 = 58,290.88 : x
  2. Step 2: Convert to fraction form
    103,612.88/142,985.54 = 58,290.88/x
  3. Step 3: Cross multiply
    103,612.88x = 142,985.54 × 58,290.88
  4. Step 4: Simplify right side
    103,612.88x = 8,334,752,953.88
  5. Step 5: Solve for x
    x = 8,334,752,953.88/103,612.88
  6. Step 6: Final answer
    x = 80,441.28

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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.