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Finding the Fourth Proportional to 142,290.80, 196,376.52 and 81,864.08

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Solution

The fourth proportional to 142,290.80, 196,376.52 and 81,864.08 is: 112,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,290.80 : 196,376.52 = 81,864.08 : x
  2. Step 2: Convert to fraction form
    142,290.80/196,376.52 = 81,864.08/x
  3. Step 3: Cross multiply
    142,290.80x = 196,376.52 × 81,864.08
  4. Step 4: Simplify right side
    142,290.80x = 16,076,183,143.40
  5. Step 5: Solve for x
    x = 16,076,183,143.40/142,290.80
  6. Step 6: Final answer
    x = 112,981.18

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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.