Finding the Fourth Proportional to 257,889,432.70, 386,834,149.05 and 128,749,269.70
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Solution
The fourth proportional to 257,889,432.70, 386,834,149.05 and 128,749,269.70 is: 193,123,904.55
Step by Step Solution
- Step 1: Write the proportion equation
257,889,432.70 : 386,834,149.05 = 128,749,269.70 : x - Step 2: Convert to fraction form
257,889,432.70/386,834,149.05 = 128,749,269.70/x - Step 3: Cross multiply
257,889,432.70x = 386,834,149.05 × 128,749,269.70 - Step 4: Simplify right side
257,889,432.70x = 49,804,614,185,208,448 - Step 5: Solve for x
x = 49,804,614,185,208,448/257,889,432.70 - Step 6: Final answer
x = 193,123,904.55
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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.