Finding the Fourth Proportional to 128,758,698.90, 193,138,048.35 and 117,043,377.30
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Solution
The fourth proportional to 128,758,698.90, 193,138,048.35 and 117,043,377.30 is: 175,565,065.95
Step by Step Solution
- Step 1: Write the proportion equation
128,758,698.90 : 193,138,048.35 = 117,043,377.30 : x - Step 2: Convert to fraction form
128,758,698.90/193,138,048.35 = 117,043,377.30/x - Step 3: Cross multiply
128,758,698.90x = 193,138,048.35 × 117,043,377.30 - Step 4: Simplify right side
128,758,698.90x = 22,605,529,464,014,692 - Step 5: Solve for x
x = 22,605,529,464,014,692/128,758,698.90 - Step 6: Final answer
x = 175,565,065.95
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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.