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Finding the Fourth Proportional to 111,480, 153,842.40 and 61,179

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Solution

The fourth proportional to 111,480, 153,842.40 and 61,179 is: 84,427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,480 : 153,842.40 = 61,179 : x
  2. Step 2: Convert to fraction form
    111,480/153,842.40 = 61,179/x
  3. Step 3: Cross multiply
    111,480x = 153,842.40 × 61,179
  4. Step 4: Simplify right side
    111,480x = 9,411,924,189.60
  5. Step 5: Solve for x
    x = 9,411,924,189.60/111,480
  6. Step 6: Final answer
    x = 84,427.02

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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.