Home / 56,129.40-77,459.70-30,978.84

Finding the Fourth Proportional to 56,129.40, 77,459.70 and 30,978.84

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Solution

The fourth proportional to 56,129.40, 77,459.70 and 30,978.84 is: 42,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,129.40 : 77,459.70 = 30,978.84 : x
  2. Step 2: Convert to fraction form
    56,129.40/77,459.70 = 30,978.84/x
  3. Step 3: Cross multiply
    56,129.40x = 77,459.70 × 30,978.84
  4. Step 4: Simplify right side
    56,129.40x = 2,399,611,652.75
  5. Step 5: Solve for x
    x = 2,399,611,652.75/56,129.40
  6. Step 6: Final answer
    x = 42,751.42

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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.