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Finding the Fourth Proportional to 56,718.99, 78,258.83 and 47,678.72

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Solution

The fourth proportional to 56,718.99, 78,258.83 and 47,678.72 is: 65,785.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,718.99 : 78,258.83 = 47,678.72 : x
  2. Step 2: Convert to fraction form
    56,718.99/78,258.83 = 47,678.72/x
  3. Step 3: Cross multiply
    56,718.99x = 78,258.83 × 47,678.72
  4. Step 4: Simplify right side
    56,718.99x = 3,731,280,213.41
  5. Step 5: Solve for x
    x = 3,731,280,213.41/56,718.99
  6. Step 6: Final answer
    x = 65,785.38

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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.