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Finding the Fourth Proportional to 103,690.65, 143,091.51 and 58,368.49

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Solution

The fourth proportional to 103,690.65, 143,091.51 and 58,368.49 is: 80,547.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,690.65 : 143,091.51 = 58,368.49 : x
  2. Step 2: Convert to fraction form
    103,690.65/143,091.51 = 58,368.49/x
  3. Step 3: Cross multiply
    103,690.65x = 143,091.51 × 58,368.49
  4. Step 4: Simplify right side
    103,690.65x = 8,352,035,370.52
  5. Step 5: Solve for x
    x = 8,352,035,370.52/103,690.65
  6. Step 6: Final answer
    x = 80,547.62

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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.