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Finding the Fourth Proportional to 98,900.61, 136,480 and 58,064.07

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Solution

The fourth proportional to 98,900.61, 136,480 and 58,064.07 is: 80,126.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,900.61 : 136,480 = 58,064.07 : x
  2. Step 2: Convert to fraction form
    98,900.61/136,480 = 58,064.07/x
  3. Step 3: Cross multiply
    98,900.61x = 136,480 × 58,064.07
  4. Step 4: Simplify right side
    98,900.61x = 7,924,584,273.60
  5. Step 5: Solve for x
    x = 7,924,584,273.60/98,900.61
  6. Step 6: Final answer
    x = 80,126.75

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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.