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Finding the Fourth Proportional to 85,503, 117,994.14 and 47,780.76

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Solution

The fourth proportional to 85,503, 117,994.14 and 47,780.76 is: 65,937.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,503 : 117,994.14 = 47,780.76 : x
  2. Step 2: Convert to fraction form
    85,503/117,994.14 = 47,780.76/x
  3. Step 3: Cross multiply
    85,503x = 117,994.14 × 47,780.76
  4. Step 4: Simplify right side
    85,503x = 5,637,849,684.75
  5. Step 5: Solve for x
    x = 5,637,849,684.75/85,503
  6. Step 6: Final answer
    x = 65,937.45

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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.