Home / 318,865.32-478,365.45-105,621.17

Finding the Fourth Proportional to 318,865.32, 478,365.45 and 105,621.17

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Solution

The fourth proportional to 318,865.32, 478,365.45 and 105,621.17 is: 158,454.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,865.32 : 478,365.45 = 105,621.17 : x
  2. Step 2: Convert to fraction form
    318,865.32/478,365.45 = 105,621.17/x
  3. Step 3: Cross multiply
    318,865.32x = 478,365.45 × 105,621.17
  4. Step 4: Simplify right side
    318,865.32x = 50,525,516,124.75
  5. Step 5: Solve for x
    x = 50,525,516,124.75/318,865.32
  6. Step 6: Final answer
    x = 158,454.10

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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.