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Finding the Fourth Proportional to 101,120.40, 139,543.70 and 55,802.12

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Solution

The fourth proportional to 101,120.40, 139,543.70 and 55,802.12 is: 77,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,120.40 : 139,543.70 = 55,802.12 : x
  2. Step 2: Convert to fraction form
    101,120.40/139,543.70 = 55,802.12/x
  3. Step 3: Cross multiply
    101,120.40x = 139,543.70 × 55,802.12
  4. Step 4: Simplify right side
    101,120.40x = 7,786,833,315.91
  5. Step 5: Solve for x
    x = 7,786,833,315.91/101,120.40
  6. Step 6: Final answer
    x = 77,005.56

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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.