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Finding the Fourth Proportional to 86,130.78, 129,203.55 and 23,801.28

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Solution

The fourth proportional to 86,130.78, 129,203.55 and 23,801.28 is: 35,703.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,130.78 : 129,203.55 = 23,801.28 : x
  2. Step 2: Convert to fraction form
    86,130.78/129,203.55 = 23,801.28/x
  3. Step 3: Cross multiply
    86,130.78x = 129,203.55 × 23,801.28
  4. Step 4: Simplify right side
    86,130.78x = 3,075,209,870.54
  5. Step 5: Solve for x
    x = 3,075,209,870.54/86,130.78
  6. Step 6: Final answer
    x = 35,703.96

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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.