Home / 212,413.28-320,038-192,173.76

Finding the Fourth Proportional to 212,413.28, 320,038 and 192,173.76

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Solution

The fourth proportional to 212,413.28, 320,038 and 192,173.76 is: 289,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,413.28 : 320,038 = 192,173.76 : x
  2. Step 2: Convert to fraction form
    212,413.28/320,038 = 192,173.76/x
  3. Step 3: Cross multiply
    212,413.28x = 320,038 × 192,173.76
  4. Step 4: Simplify right side
    212,413.28x = 61,502,905,802.88
  5. Step 5: Solve for x
    x = 61,502,905,802.88/212,413.28
  6. Step 6: Final answer
    x = 289,543.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.