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Finding the Fourth Proportional to 56,482.40, 77,945.80 and 31,331.90

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Solution

The fourth proportional to 56,482.40, 77,945.80 and 31,331.90 is: 43,238.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,482.40 : 77,945.80 = 31,331.90 : x
  2. Step 2: Convert to fraction form
    56,482.40/77,945.80 = 31,331.90/x
  3. Step 3: Cross multiply
    56,482.40x = 77,945.80 × 31,331.90
  4. Step 4: Simplify right side
    56,482.40x = 2,442,189,542.96
  5. Step 5: Solve for x
    x = 2,442,189,542.96/56,482.40
  6. Step 6: Final answer
    x = 43,238.07

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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.