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Finding the Fourth Proportional to 153,782.35, 212,219.80 and 90,120.20

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Solution

The fourth proportional to 153,782.35, 212,219.80 and 90,120.20 is: 124,365.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,782.35 : 212,219.80 = 90,120.20 : x
  2. Step 2: Convert to fraction form
    153,782.35/212,219.80 = 90,120.20/x
  3. Step 3: Cross multiply
    153,782.35x = 212,219.80 × 90,120.20
  4. Step 4: Simplify right side
    153,782.35x = 19,125,289,533.56
  5. Step 5: Solve for x
    x = 19,125,289,533.56/153,782.35
  6. Step 6: Final answer
    x = 124,365.96

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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.