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Finding the Fourth Proportional to 98,575.80, 147,863.70 and 39,420.60

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Solution

The fourth proportional to 98,575.80, 147,863.70 and 39,420.60 is: 59,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,575.80 : 147,863.70 = 39,420.60 : x
  2. Step 2: Convert to fraction form
    98,575.80/147,863.70 = 39,420.60/x
  3. Step 3: Cross multiply
    98,575.80x = 147,863.70 × 39,420.60
  4. Step 4: Simplify right side
    98,575.80x = 5,828,875,772.22
  5. Step 5: Solve for x
    x = 5,828,875,772.22/98,575.80
  6. Step 6: Final answer
    x = 59,130.90

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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.