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Finding the Fourth Proportional to 153,147.60, 211,160.58 and 99,413.01

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Solution

The fourth proportional to 153,147.60, 211,160.58 and 99,413.01 is: 137,071.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,147.60 : 211,160.58 = 99,413.01 : x
  2. Step 2: Convert to fraction form
    153,147.60/211,160.58 = 99,413.01/x
  3. Step 3: Cross multiply
    153,147.60x = 211,160.58 × 99,413.01
  4. Step 4: Simplify right side
    153,147.60x = 20,992,108,851.15
  5. Step 5: Solve for x
    x = 20,992,108,851.15/153,147.60
  6. Step 6: Final answer
    x = 137,071.09

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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.