Home / 147,771.40-221,657.10-85,409.80

Finding the Fourth Proportional to 147,771.40, 221,657.10 and 85,409.80

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Solution

The fourth proportional to 147,771.40, 221,657.10 and 85,409.80 is: 128,114.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,771.40 : 221,657.10 = 85,409.80 : x
  2. Step 2: Convert to fraction form
    147,771.40/221,657.10 = 85,409.80/x
  3. Step 3: Cross multiply
    147,771.40x = 221,657.10 × 85,409.80
  4. Step 4: Simplify right side
    147,771.40x = 18,931,688,579.58
  5. Step 5: Solve for x
    x = 18,931,688,579.58/147,771.40
  6. Step 6: Final answer
    x = 128,114.70

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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.