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Finding the Fourth Proportional to 153,518.78, 211,852.72 and 85,535.48

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Solution

The fourth proportional to 153,518.78, 211,852.72 and 85,535.48 is: 118,037.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,518.78 : 211,852.72 = 85,535.48 : x
  2. Step 2: Convert to fraction form
    153,518.78/211,852.72 = 85,535.48/x
  3. Step 3: Cross multiply
    153,518.78x = 211,852.72 × 85,535.48
  4. Step 4: Simplify right side
    153,518.78x = 18,120,924,094.51
  5. Step 5: Solve for x
    x = 18,120,924,094.51/153,518.78
  6. Step 6: Final answer
    x = 118,037.18

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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.