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Finding the Fourth Proportional to 98,368.25, 147,421.76 and 39,171.42

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Solution

The fourth proportional to 98,368.25, 147,421.76 and 39,171.42 is: 58,705.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,368.25 : 147,421.76 = 39,171.42 : x
  2. Step 2: Convert to fraction form
    98,368.25/147,421.76 = 39,171.42/x
  3. Step 3: Cross multiply
    98,368.25x = 147,421.76 × 39,171.42
  4. Step 4: Simplify right side
    98,368.25x = 5,774,719,482.24
  5. Step 5: Solve for x
    x = 5,774,719,482.24/98,368.25
  6. Step 6: Final answer
    x = 58,705.12

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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.