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Finding the Fourth Proportional to 98,693.60, 148,040.40 and 87,807.20

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Solution

The fourth proportional to 98,693.60, 148,040.40 and 87,807.20 is: 131,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,693.60 : 148,040.40 = 87,807.20 : x
  2. Step 2: Convert to fraction form
    98,693.60/148,040.40 = 87,807.20/x
  3. Step 3: Cross multiply
    98,693.60x = 148,040.40 × 87,807.20
  4. Step 4: Simplify right side
    98,693.60x = 12,999,013,010.88
  5. Step 5: Solve for x
    x = 12,999,013,010.88/98,693.60
  6. Step 6: Final answer
    x = 131,710.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.