Home / 86,528.40-129,792.60-53,140.20

Finding the Fourth Proportional to 86,528.40, 129,792.60 and 53,140.20

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Solution

The fourth proportional to 86,528.40, 129,792.60 and 53,140.20 is: 79,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,528.40 : 129,792.60 = 53,140.20 : x
  2. Step 2: Convert to fraction form
    86,528.40/129,792.60 = 53,140.20/x
  3. Step 3: Cross multiply
    86,528.40x = 129,792.60 × 53,140.20
  4. Step 4: Simplify right side
    86,528.40x = 6,897,204,722.52
  5. Step 5: Solve for x
    x = 6,897,204,722.52/86,528.40
  6. Step 6: Final answer
    x = 79,710.30

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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.