Finding the Fourth Proportional to 74,937.80, 112,406.70 and 65,721.80
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Solution
The fourth proportional to 74,937.80, 112,406.70 and 65,721.80 is: 98,582.70
Step by Step Solution
- Step 1: Write the proportion equation
74,937.80 : 112,406.70 = 65,721.80 : x - Step 2: Convert to fraction form
74,937.80/112,406.70 = 65,721.80/x - Step 3: Cross multiply
74,937.80x = 112,406.70 × 65,721.80 - Step 4: Simplify right side
74,937.80x = 7,387,570,656.06 - Step 5: Solve for x
x = 7,387,570,656.06/74,937.80 - Step 6: Final answer
x = 98,582.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.