Finding the Fourth Proportional to 128,753.30, 177,637.02 and 77,746.65
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Solution
The fourth proportional to 128,753.30, 177,637.02 and 77,746.65 is: 107,264.70
Step by Step Solution
- Step 1: Write the proportion equation
128,753.30 : 177,637.02 = 77,746.65 : x - Step 2: Convert to fraction form
128,753.30/177,637.02 = 77,746.65/x - Step 3: Cross multiply
128,753.30x = 177,637.02 × 77,746.65 - Step 4: Simplify right side
128,753.30x = 13,810,684,293.19 - Step 5: Solve for x
x = 13,810,684,293.19/128,753.30 - Step 6: Final answer
x = 107,264.70
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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.