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Finding the Fourth Proportional to 153,866.25, 212,342.76 and 86,798.25

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Solution

The fourth proportional to 153,866.25, 212,342.76 and 86,798.25 is: 119,785.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,866.25 : 212,342.76 = 86,798.25 : x
  2. Step 2: Convert to fraction form
    153,866.25/212,342.76 = 86,798.25/x
  3. Step 3: Cross multiply
    153,866.25x = 212,342.76 × 86,798.25
  4. Step 4: Simplify right side
    153,866.25x = 18,430,979,968.17
  5. Step 5: Solve for x
    x = 18,430,979,968.17/153,866.25
  6. Step 6: Final answer
    x = 119,785.72

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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.