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Finding the Fourth Proportional to 105,420.48, 145,413.60 and 73,577.60

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Solution

The fourth proportional to 105,420.48, 145,413.60 and 73,577.60 is: 101,490.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.48 : 145,413.60 = 73,577.60 : x
  2. Step 2: Convert to fraction form
    105,420.48/145,413.60 = 73,577.60/x
  3. Step 3: Cross multiply
    105,420.48x = 145,413.60 × 73,577.60
  4. Step 4: Simplify right side
    105,420.48x = 10,699,183,695.36
  5. Step 5: Solve for x
    x = 10,699,183,695.36/105,420.48
  6. Step 6: Final answer
    x = 101,490.56

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1.5x scale

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.