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Finding the Fourth Proportional to 153,607.64, 211,979.59 and 85,628.93

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Solution

The fourth proportional to 153,607.64, 211,979.59 and 85,628.93 is: 118,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,607.64 : 211,979.59 = 85,628.93 : x
  2. Step 2: Convert to fraction form
    153,607.64/211,979.59 = 85,628.93/x
  3. Step 3: Cross multiply
    153,607.64x = 211,979.59 × 85,628.93
  4. Step 4: Simplify right side
    153,607.64x = 18,151,585,473.54
  5. Step 5: Solve for x
    x = 18,151,585,473.54/153,607.64
  6. Step 6: Final answer
    x = 118,168.51

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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.