Home / 56,970.40-78,656.20-50,991.76

Finding the Fourth Proportional to 56,970.40, 78,656.20 and 50,991.76

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Solution

The fourth proportional to 56,970.40, 78,656.20 and 50,991.76 is: 70,401.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,970.40 : 78,656.20 = 50,991.76 : x
  2. Step 2: Convert to fraction form
    56,970.40/78,656.20 = 50,991.76/x
  3. Step 3: Cross multiply
    56,970.40x = 78,656.20 × 50,991.76
  4. Step 4: Simplify right side
    56,970.40x = 4,010,818,072.91
  5. Step 5: Solve for x
    x = 4,010,818,072.91/56,970.40
  6. Step 6: Final answer
    x = 70,401.79

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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.