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Finding the Fourth Proportional to 105,420.60, 158,130.90 and 98,859.60

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Solution

The fourth proportional to 105,420.60, 158,130.90 and 98,859.60 is: 148,289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.60 : 158,130.90 = 98,859.60 : x
  2. Step 2: Convert to fraction form
    105,420.60/158,130.90 = 98,859.60/x
  3. Step 3: Cross multiply
    105,420.60x = 158,130.90 × 98,859.60
  4. Step 4: Simplify right side
    105,420.60x = 15,632,757,521.64
  5. Step 5: Solve for x
    x = 15,632,757,521.64/105,420.60
  6. Step 6: Final answer
    x = 148,289.40

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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.