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Finding the Fourth Proportional to 151,421.98, 208,962.34 and 87,796.68

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Solution

The fourth proportional to 151,421.98, 208,962.34 and 87,796.68 is: 121,159.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,421.98 : 208,962.34 = 87,796.68 : x
  2. Step 2: Convert to fraction form
    151,421.98/208,962.34 = 87,796.68/x
  3. Step 3: Cross multiply
    151,421.98x = 208,962.34 × 87,796.68
  4. Step 4: Simplify right side
    151,421.98x = 18,346,199,999.95
  5. Step 5: Solve for x
    x = 18,346,199,999.95/151,421.98
  6. Step 6: Final answer
    x = 121,159.42

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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.