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Finding the Fourth Proportional to 153,656.64, 211,563.65 and 130,641.20

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Solution

The fourth proportional to 153,656.64, 211,563.65 and 130,641.20 is: 179,874.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,656.64 : 211,563.65 = 130,641.20 : x
  2. Step 2: Convert to fraction form
    153,656.64/211,563.65 = 130,641.20/x
  3. Step 3: Cross multiply
    153,656.64x = 211,563.65 × 130,641.20
  4. Step 4: Simplify right side
    153,656.64x = 27,638,927,930.26
  5. Step 5: Solve for x
    x = 27,638,927,930.26/153,656.64
  6. Step 6: Final answer
    x = 179,874.61

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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.