Home / 103,613.95-155,420.93-68,545.40

Finding the Fourth Proportional to 103,613.95, 155,420.93 and 68,545.40

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Solution

The fourth proportional to 103,613.95, 155,420.93 and 68,545.40 is: 102,818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,613.95 : 155,420.93 = 68,545.40 : x
  2. Step 2: Convert to fraction form
    103,613.95/155,420.93 = 68,545.40/x
  3. Step 3: Cross multiply
    103,613.95x = 155,420.93 × 68,545.40
  4. Step 4: Simplify right side
    103,613.95x = 10,653,389,861.05
  5. Step 5: Solve for x
    x = 10,653,389,861.05/103,613.95
  6. Step 6: Final answer
    x = 102,818.11

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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.