Finding the Fourth Proportional to 81,154.30, 121,693.14 and 47,429.99
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Solution
The fourth proportional to 81,154.30, 121,693.14 and 47,429.99 is: 71,122.59
Step by Step Solution
- Step 1: Write the proportion equation
81,154.30 : 121,693.14 = 47,429.99 : x - Step 2: Convert to fraction form
81,154.30/121,693.14 = 47,429.99/x - Step 3: Cross multiply
81,154.30x = 121,693.14 × 47,429.99 - Step 4: Simplify right side
81,154.30x = 5,771,904,301.08 - Step 5: Solve for x
x = 5,771,904,301.08/81,154.30 - Step 6: Final answer
x = 71,122.59
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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.