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Finding the Fourth Proportional to 153,690.24, 212,094.20 and 86,622.24

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Solution

The fourth proportional to 153,690.24, 212,094.20 and 86,622.24 is: 119,539.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,690.24 : 212,094.20 = 86,622.24 : x
  2. Step 2: Convert to fraction form
    153,690.24/212,094.20 = 86,622.24/x
  3. Step 3: Cross multiply
    153,690.24x = 212,094.20 × 86,622.24
  4. Step 4: Simplify right side
    153,690.24x = 18,372,074,695.01
  5. Step 5: Solve for x
    x = 18,372,074,695.01/153,690.24
  6. Step 6: Final answer
    x = 119,539.63

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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.