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Finding the Fourth Proportional to 142,783, 197,048.40 and 79,119.40

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Solution

The fourth proportional to 142,783, 197,048.40 and 79,119.40 is: 109,189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783 : 197,048.40 = 79,119.40 : x
  2. Step 2: Convert to fraction form
    142,783/197,048.40 = 79,119.40/x
  3. Step 3: Cross multiply
    142,783x = 197,048.40 × 79,119.40
  4. Step 4: Simplify right side
    142,783x = 15,590,351,178.96
  5. Step 5: Solve for x
    x = 15,590,351,178.96/142,783
  6. Step 6: Final answer
    x = 109,189.13

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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.