Finding the Fourth Proportional to 128,709,747.60, 193,064,621.40 and 115,720,717.20
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Solution
The fourth proportional to 128,709,747.60, 193,064,621.40 and 115,720,717.20 is: 173,581,075.80
Step by Step Solution
- Step 1: Write the proportion equation
128,709,747.60 : 193,064,621.40 = 115,720,717.20 : x - Step 2: Convert to fraction form
128,709,747.60/193,064,621.40 = 115,720,717.20/x - Step 3: Cross multiply
128,709,747.60x = 193,064,621.40 × 115,720,717.20 - Step 4: Simplify right side
128,709,747.60x = 22,341,576,454,354,468 - Step 5: Solve for x
x = 22,341,576,454,354,468/128,709,747.60 - Step 6: Final answer
x = 173,581,075.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.