Finding the Fourth Proportional to 128,736,352.80, 193,104,529.20 and 74,316,794.40
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Solution
The fourth proportional to 128,736,352.80, 193,104,529.20 and 74,316,794.40 is: 111,475,191.60
Step by Step Solution
- Step 1: Write the proportion equation
128,736,352.80 : 193,104,529.20 = 74,316,794.40 : x - Step 2: Convert to fraction form
128,736,352.80/193,104,529.20 = 74,316,794.40/x - Step 3: Cross multiply
128,736,352.80x = 193,104,529.20 × 74,316,794.40 - Step 4: Simplify right side
128,736,352.80x = 14,350,909,594,265,196 - Step 5: Solve for x
x = 14,350,909,594,265,196/128,736,352.80 - Step 6: Final answer
x = 111,475,191.60
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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.