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Finding the Fourth Proportional to 125,136.59, 172,688.70 and 67,776.03

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Solution

The fourth proportional to 125,136.59, 172,688.70 and 67,776.03 is: 93,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,136.59 : 172,688.70 = 67,776.03 : x
  2. Step 2: Convert to fraction form
    125,136.59/172,688.70 = 67,776.03/x
  3. Step 3: Cross multiply
    125,136.59x = 172,688.70 × 67,776.03
  4. Step 4: Simplify right side
    125,136.59x = 11,704,155,413.60
  5. Step 5: Solve for x
    x = 11,704,155,413.60/125,136.59
  6. Step 6: Final answer
    x = 93,531.04

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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.