Finding the Fourth Proportional to 142,007.99, 195,970.08 and 78,345.63
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Solution
The fourth proportional to 142,007.99, 195,970.08 and 78,345.63 is: 108,116.45
Step by Step Solution
- Step 1: Write the proportion equation
142,007.99 : 195,970.08 = 78,345.63 : x - Step 2: Convert to fraction form
142,007.99/195,970.08 = 78,345.63/x - Step 3: Cross multiply
142,007.99x = 195,970.08 × 78,345.63 - Step 4: Simplify right side
142,007.99x = 15,353,399,672.55 - Step 5: Solve for x
x = 15,353,399,672.55/142,007.99 - Step 6: Final answer
x = 108,116.45
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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.