Home / 191,963.40-287,945.10-128,977.80

Finding the Fourth Proportional to 191,963.40, 287,945.10 and 128,977.80

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Solution

The fourth proportional to 191,963.40, 287,945.10 and 128,977.80 is: 193,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,963.40 : 287,945.10 = 128,977.80 : x
  2. Step 2: Convert to fraction form
    191,963.40/287,945.10 = 128,977.80/x
  3. Step 3: Cross multiply
    191,963.40x = 287,945.10 × 128,977.80
  4. Step 4: Simplify right side
    191,963.40x = 37,138,525,518.78
  5. Step 5: Solve for x
    x = 37,138,525,518.78/191,963.40
  6. Step 6: Final answer
    x = 193,466.70

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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.