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Finding the Fourth Proportional to 153,283.60, 211,538.28 and 86,215.60

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Solution

The fourth proportional to 153,283.60, 211,538.28 and 86,215.60 is: 118,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,283.60 : 211,538.28 = 86,215.60 : x
  2. Step 2: Convert to fraction form
    153,283.60/211,538.28 = 86,215.60/x
  3. Step 3: Cross multiply
    153,283.60x = 211,538.28 × 86,215.60
  4. Step 4: Simplify right side
    153,283.60x = 18,237,899,733.17
  5. Step 5: Solve for x
    x = 18,237,899,733.17/153,283.60
  6. Step 6: Final answer
    x = 118,981.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.