Home / 90,688.50-136,035.80-40,768.76

Finding the Fourth Proportional to 90,688.50, 136,035.80 and 40,768.76

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Solution

The fourth proportional to 90,688.50, 136,035.80 and 40,768.76 is: 61,154.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,688.50 : 136,035.80 = 40,768.76 : x
  2. Step 2: Convert to fraction form
    90,688.50/136,035.80 = 40,768.76/x
  3. Step 3: Cross multiply
    90,688.50x = 136,035.80 × 40,768.76
  4. Step 4: Simplify right side
    90,688.50x = 5,546,009,997.59
  5. Step 5: Solve for x
    x = 5,546,009,997.59/90,688.50
  6. Step 6: Final answer
    x = 61,154.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.