Home / 141,887.20-212,830.80-78,901.60

Finding the Fourth Proportional to 141,887.20, 212,830.80 and 78,901.60

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Solution

The fourth proportional to 141,887.20, 212,830.80 and 78,901.60 is: 118,352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,887.20 : 212,830.80 = 78,901.60 : x
  2. Step 2: Convert to fraction form
    141,887.20/212,830.80 = 78,901.60/x
  3. Step 3: Cross multiply
    141,887.20x = 212,830.80 × 78,901.60
  4. Step 4: Simplify right side
    141,887.20x = 16,792,690,649.28
  5. Step 5: Solve for x
    x = 16,792,690,649.28/141,887.20
  6. Step 6: Final answer
    x = 118,352.40

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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.