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Finding the Fourth Proportional to 45,690, 68,545.08 and 19,417.20

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Solution

The fourth proportional to 45,690, 68,545.08 and 19,417.20 is: 29,130.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,690 : 68,545.08 = 19,417.20 : x
  2. Step 2: Convert to fraction form
    45,690/68,545.08 = 19,417.20/x
  3. Step 3: Cross multiply
    45,690x = 68,545.08 × 19,417.20
  4. Step 4: Simplify right side
    45,690x = 1,330,953,527.38
  5. Step 5: Solve for x
    x = 1,330,953,527.38/45,690
  6. Step 6: Final answer
    x = 29,130.08

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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.