Finding the Fourth Proportional to 105,732.90, 145,915.65 and 57,987.99
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Solution
The fourth proportional to 105,732.90, 145,915.65 and 57,987.99 is: 80,025.76
Step by Step Solution
- Step 1: Write the proportion equation
105,732.90 : 145,915.65 = 57,987.99 : x - Step 2: Convert to fraction form
105,732.90/145,915.65 = 57,987.99/x - Step 3: Cross multiply
105,732.90x = 145,915.65 × 57,987.99 - Step 4: Simplify right side
105,732.90x = 8,461,355,253.04 - Step 5: Solve for x
x = 8,461,355,253.04/105,732.90 - Step 6: Final answer
x = 80,025.76
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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.