Finding the Fourth Proportional to 128,931.17, 193,398.09 and 38,974.62
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Solution
The fourth proportional to 128,931.17, 193,398.09 and 38,974.62 is: 58,462.34
Step by Step Solution
- Step 1: Write the proportion equation
128,931.17 : 193,398.09 = 38,974.62 : x - Step 2: Convert to fraction form
128,931.17/193,398.09 = 38,974.62/x - Step 3: Cross multiply
128,931.17x = 193,398.09 × 38,974.62 - Step 4: Simplify right side
128,931.17x = 7,537,617,452.53 - Step 5: Solve for x
x = 7,537,617,452.53/128,931.17 - Step 6: Final answer
x = 58,462.34
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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.