Home / 78,030.96-107,682.45-42,220.81

Finding the Fourth Proportional to 78,030.96, 107,682.45 and 42,220.81

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Solution

The fourth proportional to 78,030.96, 107,682.45 and 42,220.81 is: 58,264.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,030.96 : 107,682.45 = 42,220.81 : x
  2. Step 2: Convert to fraction form
    78,030.96/107,682.45 = 42,220.81/x
  3. Step 3: Cross multiply
    78,030.96x = 107,682.45 × 42,220.81
  4. Step 4: Simplify right side
    78,030.96x = 4,546,440,238.06
  5. Step 5: Solve for x
    x = 4,546,440,238.06/78,030.96
  6. Step 6: Final answer
    x = 58,264.57

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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.