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Finding the Fourth Proportional to 56,885.49, 78,499.13 and 31,730.13

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Solution

The fourth proportional to 56,885.49, 78,499.13 and 31,730.13 is: 43,785.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,885.49 : 78,499.13 = 31,730.13 : x
  2. Step 2: Convert to fraction form
    56,885.49/78,499.13 = 31,730.13/x
  3. Step 3: Cross multiply
    56,885.49x = 78,499.13 × 31,730.13
  4. Step 4: Simplify right side
    56,885.49x = 2,490,787,441.14
  5. Step 5: Solve for x
    x = 2,490,787,441.14/56,885.49
  6. Step 6: Final answer
    x = 43,785.99

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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.