Home / 85,947.69-128,921.14-26,783.40

Finding the Fourth Proportional to 85,947.69, 128,921.14 and 26,783.40

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Solution

The fourth proportional to 85,947.69, 128,921.14 and 26,783.40 is: 40,174.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.69 : 128,921.14 = 26,783.40 : x
  2. Step 2: Convert to fraction form
    85,947.69/128,921.14 = 26,783.40/x
  3. Step 3: Cross multiply
    85,947.69x = 128,921.14 × 26,783.40
  4. Step 4: Simplify right side
    85,947.69x = 3,452,946,461.08
  5. Step 5: Solve for x
    x = 3,452,946,461.08/85,947.69
  6. Step 6: Final answer
    x = 40,174.98

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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.