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Finding the Fourth Proportional to 111,420.88, 153,771.86 and 63,681.08

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Solution

The fourth proportional to 111,420.88, 153,771.86 and 63,681.08 is: 87,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,420.88 : 153,771.86 = 63,681.08 : x
  2. Step 2: Convert to fraction form
    111,420.88/153,771.86 = 63,681.08/x
  3. Step 3: Cross multiply
    111,420.88x = 153,771.86 × 63,681.08
  4. Step 4: Simplify right side
    111,420.88x = 9,792,358,118.41
  5. Step 5: Solve for x
    x = 9,792,358,118.41/111,420.88
  6. Step 6: Final answer
    x = 87,886.20

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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.