Home / 85,982.49-128,973.65-56,393.40

Finding the Fourth Proportional to 85,982.49, 128,973.65 and 56,393.40

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Solution

The fourth proportional to 85,982.49, 128,973.65 and 56,393.40 is: 84,590.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,982.49 : 128,973.65 = 56,393.40 : x
  2. Step 2: Convert to fraction form
    85,982.49/128,973.65 = 56,393.40/x
  3. Step 3: Cross multiply
    85,982.49x = 128,973.65 × 56,393.40
  4. Step 4: Simplify right side
    85,982.49x = 7,273,262,351.94
  5. Step 5: Solve for x
    x = 7,273,262,351.94/85,982.49
  6. Step 6: Final answer
    x = 84,590.04

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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.