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Finding the Fourth Proportional to 56,955.59, 78,605.39 and 47,378.55

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Solution

The fourth proportional to 56,955.59, 78,605.39 and 47,378.55 is: 65,387.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,955.59 : 78,605.39 = 47,378.55 : x
  2. Step 2: Convert to fraction form
    56,955.59/78,605.39 = 47,378.55/x
  3. Step 3: Cross multiply
    56,955.59x = 78,605.39 × 47,378.55
  4. Step 4: Simplify right side
    56,955.59x = 3,724,209,163.49
  5. Step 5: Solve for x
    x = 3,724,209,163.49/56,955.59
  6. Step 6: Final answer
    x = 65,387.95

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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.