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Finding the Fourth Proportional to 153,769.65, 212,222.93 and 90,132.93

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Solution

The fourth proportional to 153,769.65, 212,222.93 and 90,132.93 is: 124,395.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,769.65 : 212,222.93 = 90,132.93 : x
  2. Step 2: Convert to fraction form
    153,769.65/212,222.93 = 90,132.93/x
  3. Step 3: Cross multiply
    153,769.65x = 212,222.93 × 90,132.93
  4. Step 4: Simplify right side
    153,769.65x = 19,128,274,043.42
  5. Step 5: Solve for x
    x = 19,128,274,043.42/153,769.65
  6. Step 6: Final answer
    x = 124,395.64

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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.