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Finding the Fourth Proportional to 153,457.39, 211,780.88 and 86,393.71

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Solution

The fourth proportional to 153,457.39, 211,780.88 and 86,393.71 is: 119,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,457.39 : 211,780.88 = 86,393.71 : x
  2. Step 2: Convert to fraction form
    153,457.39/211,780.88 = 86,393.71/x
  3. Step 3: Cross multiply
    153,457.39x = 211,780.88 × 86,393.71
  4. Step 4: Simplify right side
    153,457.39x = 18,296,535,930.26
  5. Step 5: Solve for x
    x = 18,296,535,930.26/153,457.39
  6. Step 6: Final answer
    x = 119,228.77

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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.