Finding the Fourth Proportional to 128,281,140.81, 177,021,156.29 and 72,523,227.56
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Solution
The fourth proportional to 128,281,140.81, 177,021,156.29 and 72,523,227.56 is: 100,078,199.49
Step by Step Solution
- Step 1: Write the proportion equation
128,281,140.81 : 177,021,156.29 = 72,523,227.56 : x - Step 2: Convert to fraction form
128,281,140.81/177,021,156.29 = 72,523,227.56/x - Step 3: Cross multiply
128,281,140.81x = 177,021,156.29 × 72,523,227.56 - Step 4: Simplify right side
128,281,140.81x = 12,838,145,599,668,890 - Step 5: Solve for x
x = 12,838,145,599,668,890/128,281,140.81 - Step 6: Final answer
x = 100,078,199.49
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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.