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Finding the Fourth Proportional to 101,170.79, 139,615.72 and 55,848.80

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Solution

The fourth proportional to 101,170.79, 139,615.72 and 55,848.80 is: 77,071.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,170.79 : 139,615.72 = 55,848.80 : x
  2. Step 2: Convert to fraction form
    101,170.79/139,615.72 = 55,848.80/x
  3. Step 3: Cross multiply
    101,170.79x = 139,615.72 × 55,848.80
  4. Step 4: Simplify right side
    101,170.79x = 7,797,370,492.93
  5. Step 5: Solve for x
    x = 7,797,370,492.93/101,170.79
  6. Step 6: Final answer
    x = 77,071.36

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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.