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Finding the Fourth Proportional to 153,070.89, 211,219.79 and 90,971.71

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Solution

The fourth proportional to 153,070.89, 211,219.79 and 90,971.71 is: 125,530.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,070.89 : 211,219.79 = 90,971.71 : x
  2. Step 2: Convert to fraction form
    153,070.89/211,219.79 = 90,971.71/x
  3. Step 3: Cross multiply
    153,070.89x = 211,219.79 × 90,971.71
  4. Step 4: Simplify right side
    153,070.89x = 19,215,025,027.28
  5. Step 5: Solve for x
    x = 19,215,025,027.28/153,070.89
  6. Step 6: Final answer
    x = 125,530.24

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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.