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Finding the Fourth Proportional to 100,930.34, 139,290.09 and 56,218.34

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Solution

The fourth proportional to 100,930.34, 139,290.09 and 56,218.34 is: 77,584.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,930.34 : 139,290.09 = 56,218.34 : x
  2. Step 2: Convert to fraction form
    100,930.34/139,290.09 = 56,218.34/x
  3. Step 3: Cross multiply
    100,930.34x = 139,290.09 × 56,218.34
  4. Step 4: Simplify right side
    100,930.34x = 7,830,657,638.25
  5. Step 5: Solve for x
    x = 7,830,657,638.25/100,930.34
  6. Step 6: Final answer
    x = 77,584.77

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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.