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Finding the Fourth Proportional to 153,146.60, 211,159.20 and 99,412.01

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Solution

The fourth proportional to 153,146.60, 211,159.20 and 99,412.01 is: 137,069.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,146.60 : 211,159.20 = 99,412.01 : x
  2. Step 2: Convert to fraction form
    153,146.60/211,159.20 = 99,412.01/x
  3. Step 3: Cross multiply
    153,146.60x = 211,159.20 × 99,412.01
  4. Step 4: Simplify right side
    153,146.60x = 20,991,760,610.84
  5. Step 5: Solve for x
    x = 20,991,760,610.84/153,146.60
  6. Step 6: Final answer
    x = 137,069.71

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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.