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Finding the Fourth Proportional to 111,031, 153,222.78 and 60,730

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Solution

The fourth proportional to 111,031, 153,222.78 and 60,730 is: 83,807.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,031 : 153,222.78 = 60,730 : x
  2. Step 2: Convert to fraction form
    111,031/153,222.78 = 60,730/x
  3. Step 3: Cross multiply
    111,031x = 153,222.78 × 60,730
  4. Step 4: Simplify right side
    111,031x = 9,305,219,429.40
  5. Step 5: Solve for x
    x = 9,305,219,429.40/111,031
  6. Step 6: Final answer
    x = 83,807.40

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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.