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Finding the Fourth Proportional to 74,649.60, 102,643.20 and 71,539.20

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Solution

The fourth proportional to 74,649.60, 102,643.20 and 71,539.20 is: 98,366.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,649.60 : 102,643.20 = 71,539.20 : x
  2. Step 2: Convert to fraction form
    74,649.60/102,643.20 = 71,539.20/x
  3. Step 3: Cross multiply
    74,649.60x = 102,643.20 × 71,539.20
  4. Step 4: Simplify right side
    74,649.60x = 7,343,012,413.44
  5. Step 5: Solve for x
    x = 7,343,012,413.44/74,649.60
  6. Step 6: Final answer
    x = 98,366.40

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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.