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Finding the Fourth Proportional to 153,585.36, 211,963.32 and 85,613.40

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Solution

The fourth proportional to 153,585.36, 211,963.32 and 85,613.40 is: 118,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,585.36 : 211,963.32 = 85,613.40 : x
  2. Step 2: Convert to fraction form
    153,585.36/211,963.32 = 85,613.40/x
  3. Step 3: Cross multiply
    153,585.36x = 211,963.32 × 85,613.40
  4. Step 4: Simplify right side
    153,585.36x = 18,146,900,500.49
  5. Step 5: Solve for x
    x = 18,146,900,500.49/153,585.36
  6. Step 6: Final answer
    x = 118,155.15

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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.