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Finding the Fourth Proportional to 153,819.51, 212,270.96 and 84,909.01

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Solution

The fourth proportional to 153,819.51, 212,270.96 and 84,909.01 is: 117,174.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,819.51 : 212,270.96 = 84,909.01 : x
  2. Step 2: Convert to fraction form
    153,819.51/212,270.96 = 84,909.01/x
  3. Step 3: Cross multiply
    153,819.51x = 212,270.96 × 84,909.01
  4. Step 4: Simplify right side
    153,819.51x = 18,023,717,808.30
  5. Step 5: Solve for x
    x = 18,023,717,808.30/153,819.51
  6. Step 6: Final answer
    x = 117,174.46

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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.