Finding the Fourth Proportional to 153,459.79, 211,807.19 and 103,129.63
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Solution
The fourth proportional to 153,459.79, 211,807.19 and 103,129.63 is: 142,340.85
Step by Step Solution
- Step 1: Write the proportion equation
153,459.79 : 211,807.19 = 103,129.63 : x - Step 2: Convert to fraction form
153,459.79/211,807.19 = 103,129.63/x - Step 3: Cross multiply
153,459.79x = 211,807.19 × 103,129.63 - Step 4: Simplify right side
153,459.79x = 21,843,597,136.04 - Step 5: Solve for x
x = 21,843,597,136.04/153,459.79 - Step 6: Final answer
x = 142,340.85
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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.