Finding the Fourth Proportional to 138,553.18, 191,203.28 and 74,890.98
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Solution
The fourth proportional to 138,553.18, 191,203.28 and 74,890.98 is: 103,349.49
Step by Step Solution
- Step 1: Write the proportion equation
138,553.18 : 191,203.28 = 74,890.98 : x - Step 2: Convert to fraction form
138,553.18/191,203.28 = 74,890.98/x - Step 3: Cross multiply
138,553.18x = 191,203.28 × 74,890.98 - Step 4: Simplify right side
138,553.18x = 14,319,400,643.96 - Step 5: Solve for x
x = 14,319,400,643.96/138,553.18 - Step 6: Final answer
x = 103,349.49
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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.