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Finding the Fourth Proportional to 101,215.68, 139,677.84 and 56,503.68

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Solution

The fourth proportional to 101,215.68, 139,677.84 and 56,503.68 is: 77,975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,215.68 : 139,677.84 = 56,503.68 : x
  2. Step 2: Convert to fraction form
    101,215.68/139,677.84 = 56,503.68/x
  3. Step 3: Cross multiply
    101,215.68x = 139,677.84 × 56,503.68
  4. Step 4: Simplify right side
    101,215.68x = 7,892,311,974.45
  5. Step 5: Solve for x
    x = 7,892,311,974.45/101,215.68
  6. Step 6: Final answer
    x = 77,975.19

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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.