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Finding the Fourth Proportional to 56,603.66, 78,113.83 and 31,112.47

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Solution

The fourth proportional to 56,603.66, 78,113.83 and 31,112.47 is: 42,935.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,603.66 : 78,113.83 = 31,112.47 : x
  2. Step 2: Convert to fraction form
    56,603.66/78,113.83 = 31,112.47/x
  3. Step 3: Cross multiply
    56,603.66x = 78,113.83 × 31,112.47
  4. Step 4: Simplify right side
    56,603.66x = 2,430,313,984.87
  5. Step 5: Solve for x
    x = 2,430,313,984.87/56,603.66
  6. Step 6: Final answer
    x = 42,935.63

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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.