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Finding the Fourth Proportional to 85,432.71, 117,894.74 and 47,191.55

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Solution

The fourth proportional to 85,432.71, 117,894.74 and 47,191.55 is: 65,123.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,432.71 : 117,894.74 = 47,191.55 : x
  2. Step 2: Convert to fraction form
    85,432.71/117,894.74 = 47,191.55/x
  3. Step 3: Cross multiply
    85,432.71x = 117,894.74 × 47,191.55
  4. Step 4: Simplify right side
    85,432.71x = 5,563,634,692.02
  5. Step 5: Solve for x
    x = 5,563,634,692.02/85,432.71
  6. Step 6: Final answer
    x = 65,123.00

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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.