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Finding the Fourth Proportional to 153,561.57, 211,905.64 and 84,648.01

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Solution

The fourth proportional to 153,561.57, 211,905.64 and 84,648.01 is: 116,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,561.57 : 211,905.64 = 84,648.01 : x
  2. Step 2: Convert to fraction form
    153,561.57/211,905.64 = 84,648.01/x
  3. Step 3: Cross multiply
    153,561.57x = 211,905.64 × 84,648.01
  4. Step 4: Simplify right side
    153,561.57x = 17,937,390,733.78
  5. Step 5: Solve for x
    x = 17,937,390,733.78/153,561.57
  6. Step 6: Final answer
    x = 116,809.11

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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.