Finding the Fourth Proportional to 128,891,360.41, 177,873,926.73 and 79,360,308.74
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Solution
The fourth proportional to 128,891,360.41, 177,873,926.73 and 79,360,308.74 is: 109,519,596.17
Step by Step Solution
- Step 1: Write the proportion equation
128,891,360.41 : 177,873,926.73 = 79,360,308.74 : x - Step 2: Convert to fraction form
128,891,360.41/177,873,926.73 = 79,360,308.74/x - Step 3: Cross multiply
128,891,360.41x = 177,873,926.73 × 79,360,308.74 - Step 4: Simplify right side
128,891,360.41x = 14,116,129,742,088,936 - Step 5: Solve for x
x = 14,116,129,742,088,936/128,891,360.41 - Step 6: Final answer
x = 109,519,596.17
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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.