Home / 76,683.15-105,820.16-43,142.67

Finding the Fourth Proportional to 76,683.15, 105,820.16 and 43,142.67

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Solution

The fourth proportional to 76,683.15, 105,820.16 and 43,142.67 is: 59,535.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,683.15 : 105,820.16 = 43,142.67 : x
  2. Step 2: Convert to fraction form
    76,683.15/105,820.16 = 43,142.67/x
  3. Step 3: Cross multiply
    76,683.15x = 105,820.16 × 43,142.67
  4. Step 4: Simplify right side
    76,683.15x = 4,565,364,026.51
  5. Step 5: Solve for x
    x = 4,565,364,026.51/76,683.15
  6. Step 6: Final answer
    x = 59,535.43

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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.