Home / 78,125.05-107,812.53-42,315.06

Finding the Fourth Proportional to 78,125.05, 107,812.53 and 42,315.06

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Solution

The fourth proportional to 78,125.05, 107,812.53 and 42,315.06 is: 58,394.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,125.05 : 107,812.53 = 42,315.06 : x
  2. Step 2: Convert to fraction form
    78,125.05/107,812.53 = 42,315.06/x
  3. Step 3: Cross multiply
    78,125.05x = 107,812.53 × 42,315.06
  4. Step 4: Simplify right side
    78,125.05x = 4,562,093,675.70
  5. Step 5: Solve for x
    x = 4,562,093,675.70/78,125.05
  6. Step 6: Final answer
    x = 58,394.76

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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.