Home / 56,531.23-78,009.20-31,378.75

Finding the Fourth Proportional to 56,531.23, 78,009.20 and 31,378.75

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Solution

The fourth proportional to 56,531.23, 78,009.20 and 31,378.75 is: 43,300.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,531.23 : 78,009.20 = 31,378.75 : x
  2. Step 2: Convert to fraction form
    56,531.23/78,009.20 = 31,378.75/x
  3. Step 3: Cross multiply
    56,531.23x = 78,009.20 × 31,378.75
  4. Step 4: Simplify right side
    56,531.23x = 2,447,831,027.61
  5. Step 5: Solve for x
    x = 2,447,831,027.61/56,531.23
  6. Step 6: Final answer
    x = 43,300.51

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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.