Finding the Fourth Proportional to 128,001,225.40, 176,642,506.62 and 75,067,140.26
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Solution
The fourth proportional to 128,001,225.40, 176,642,506.62 and 75,067,140.26 is: 103,593,131.86
Step by Step Solution
- Step 1: Write the proportion equation
128,001,225.40 : 176,642,506.62 = 75,067,140.26 : x - Step 2: Convert to fraction form
128,001,225.40/176,642,506.62 = 75,067,140.26/x - Step 3: Cross multiply
128,001,225.40x = 176,642,506.62 × 75,067,140.26 - Step 4: Simplify right side
128,001,225.40x = 13,260,047,820,763,126 - Step 5: Solve for x
x = 13,260,047,820,763,126/128,001,225.40 - Step 6: Final answer
x = 103,593,131.86
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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.