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Finding the Fourth Proportional to 153,570.60, 211,918.86 and 84,657.84

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Solution

The fourth proportional to 153,570.60, 211,918.86 and 84,657.84 is: 116,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,570.60 : 211,918.86 = 84,657.84 : x
  2. Step 2: Convert to fraction form
    153,570.60/211,918.86 = 84,657.84/x
  3. Step 3: Cross multiply
    153,570.60x = 211,918.86 × 84,657.84
  4. Step 4: Simplify right side
    153,570.60x = 17,940,592,942.86
  5. Step 5: Solve for x
    x = 17,940,592,942.86/153,570.60
  6. Step 6: Final answer
    x = 116,823.10

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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.