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Finding the Fourth Proportional to 117,374.40, 161,971.20 and 72,043.20

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Solution

The fourth proportional to 117,374.40, 161,971.20 and 72,043.20 is: 99,416.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,374.40 : 161,971.20 = 72,043.20 : x
  2. Step 2: Convert to fraction form
    117,374.40/161,971.20 = 72,043.20/x
  3. Step 3: Cross multiply
    117,374.40x = 161,971.20 × 72,043.20
  4. Step 4: Simplify right side
    117,374.40x = 11,668,923,555.84
  5. Step 5: Solve for x
    x = 11,668,923,555.84/117,374.40
  6. Step 6: Final answer
    x = 99,416.26

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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.