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Finding the Fourth Proportional to 213,574.80, 320,337.90 and 55,819.20

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Solution

The fourth proportional to 213,574.80, 320,337.90 and 55,819.20 is: 83,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,574.80 : 320,337.90 = 55,819.20 : x
  2. Step 2: Convert to fraction form
    213,574.80/320,337.90 = 55,819.20/x
  3. Step 3: Cross multiply
    213,574.80x = 320,337.90 × 55,819.20
  4. Step 4: Simplify right side
    213,574.80x = 17,881,005,307.68
  5. Step 5: Solve for x
    x = 17,881,005,307.68/213,574.80
  6. Step 6: Final answer
    x = 83,722.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.