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Finding the Fourth Proportional to 56,507.43, 77,983.07 and 31,013.57

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Solution

The fourth proportional to 56,507.43, 77,983.07 and 31,013.57 is: 42,800.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,507.43 : 77,983.07 = 31,013.57 : x
  2. Step 2: Convert to fraction form
    56,507.43/77,983.07 = 31,013.57/x
  3. Step 3: Cross multiply
    56,507.43x = 77,983.07 × 31,013.57
  4. Step 4: Simplify right side
    56,507.43x = 2,418,533,400.26
  5. Step 5: Solve for x
    x = 2,418,533,400.26/56,507.43
  6. Step 6: Final answer
    x = 42,800.27

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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.