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Finding the Fourth Proportional to 60,085.90, 90,143.61 and 20,643.58

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Solution

The fourth proportional to 60,085.90, 90,143.61 and 20,643.58 is: 30,970.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,085.90 : 90,143.61 = 20,643.58 : x
  2. Step 2: Convert to fraction form
    60,085.90/90,143.61 = 20,643.58/x
  3. Step 3: Cross multiply
    60,085.90x = 90,143.61 × 20,643.58
  4. Step 4: Simplify right side
    60,085.90x = 1,860,886,824.52
  5. Step 5: Solve for x
    x = 1,860,886,824.52/60,085.90
  6. Step 6: Final answer
    x = 30,970.44

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1.5x scale

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.