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Finding the Fourth Proportional to 101,209.28, 139,636.32 and 56,488.64

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Solution

The fourth proportional to 101,209.28, 139,636.32 and 56,488.64 is: 77,936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,209.28 : 139,636.32 = 56,488.64 : x
  2. Step 2: Convert to fraction form
    101,209.28/139,636.32 = 56,488.64/x
  3. Step 3: Cross multiply
    101,209.28x = 139,636.32 × 56,488.64
  4. Step 4: Simplify right side
    101,209.28x = 7,887,865,811.40
  5. Step 5: Solve for x
    x = 7,887,865,811.40/101,209.28
  6. Step 6: Final answer
    x = 77,936.19

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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.