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Finding the Fourth Proportional to 153,108.48, 211,271.68 and 86,036.48

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Solution

The fourth proportional to 153,108.48, 211,271.68 and 86,036.48 is: 118,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,108.48 : 211,271.68 = 86,036.48 : x
  2. Step 2: Convert to fraction form
    153,108.48/211,271.68 = 86,036.48/x
  3. Step 3: Cross multiply
    153,108.48x = 211,271.68 × 86,036.48
  4. Step 4: Simplify right side
    153,108.48x = 18,177,071,670.89
  5. Step 5: Solve for x
    x = 18,177,071,670.89/153,108.48
  6. Step 6: Final answer
    x = 118,720.22

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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.