Home / 70,521.08-105,782.04-28,420.52

Finding the Fourth Proportional to 70,521.08, 105,782.04 and 28,420.52

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Solution

The fourth proportional to 70,521.08, 105,782.04 and 28,420.52 is: 42,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,521.08 : 105,782.04 = 28,420.52 : x
  2. Step 2: Convert to fraction form
    70,521.08/105,782.04 = 28,420.52/x
  3. Step 3: Cross multiply
    70,521.08x = 105,782.04 × 28,420.52
  4. Step 4: Simplify right side
    70,521.08x = 3,006,380,583.46
  5. Step 5: Solve for x
    x = 3,006,380,583.46/70,521.08
  6. Step 6: Final answer
    x = 42,630.95

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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.