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Finding the Fourth Proportional to 111,445.89, 153,798 and 61,144.89

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Solution

The fourth proportional to 111,445.89, 153,798 and 61,144.89 is: 84,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,445.89 : 153,798 = 61,144.89 : x
  2. Step 2: Convert to fraction form
    111,445.89/153,798 = 61,144.89/x
  3. Step 3: Cross multiply
    111,445.89x = 153,798 × 61,144.89
  4. Step 4: Simplify right side
    111,445.89x = 9,403,961,792.22
  5. Step 5: Solve for x
    x = 9,403,961,792.22/111,445.89
  6. Step 6: Final answer
    x = 84,381.41

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1.5x scale

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.