Finding the Fourth Proportional to 128,012.19, 176,656.08 and 69,868.95
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Solution
The fourth proportional to 128,012.19, 176,656.08 and 69,868.95 is: 96,418.75
Step by Step Solution
- Step 1: Write the proportion equation
128,012.19 : 176,656.08 = 69,868.95 : x - Step 2: Convert to fraction form
128,012.19/176,656.08 = 69,868.95/x - Step 3: Cross multiply
128,012.19x = 176,656.08 × 69,868.95 - Step 4: Simplify right side
128,012.19x = 12,342,774,820.72 - Step 5: Solve for x
x = 12,342,774,820.72/128,012.19 - Step 6: Final answer
x = 96,418.75
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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.