Finding the Fourth Proportional to 76,980.45, 106,230.95 and 42,987.99
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Solution
The fourth proportional to 76,980.45, 106,230.95 and 42,987.99 is: 59,322.27
Step by Step Solution
- Step 1: Write the proportion equation
76,980.45 : 106,230.95 = 42,987.99 : x - Step 2: Convert to fraction form
76,980.45/106,230.95 = 42,987.99/x - Step 3: Cross multiply
76,980.45x = 106,230.95 × 42,987.99 - Step 4: Simplify right side
76,980.45x = 4,566,654,801.35 - Step 5: Solve for x
x = 4,566,654,801.35/76,980.45 - Step 6: Final answer
x = 59,322.27
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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.