Finding the Fourth Proportional to 74,978.96, 103,470.99 and 40,987.60
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Solution
The fourth proportional to 74,978.96, 103,470.99 and 40,987.60 is: 56,562.90
Step by Step Solution
- Step 1: Write the proportion equation
74,978.96 : 103,470.99 = 40,987.60 : x - Step 2: Convert to fraction form
74,978.96/103,470.99 = 40,987.60/x - Step 3: Cross multiply
74,978.96x = 103,470.99 × 40,987.60 - Step 4: Simplify right side
74,978.96x = 4,241,026,827.43 - Step 5: Solve for x
x = 4,241,026,827.43/74,978.96 - Step 6: Final answer
x = 56,562.90
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.