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Finding the Fourth Proportional to 122,652.67, 169,245.53 and 70,978.63

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Solution

The fourth proportional to 122,652.67, 169,245.53 and 70,978.63 is: 97,941.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,652.67 : 169,245.53 = 70,978.63 : x
  2. Step 2: Convert to fraction form
    122,652.67/169,245.53 = 70,978.63/x
  3. Step 3: Cross multiply
    122,652.67x = 169,245.53 × 70,978.63
  4. Step 4: Simplify right side
    122,652.67x = 12,012,815,498.13
  5. Step 5: Solve for x
    x = 12,012,815,498.13/122,652.67
  6. Step 6: Final answer
    x = 97,941.74

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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.