Finding the Fourth Proportional to 128,963,709.20, 193,193,621.40 and 77,693,430.80
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Solution
The fourth proportional to 128,963,709.20, 193,193,621.40 and 77,693,430.80 is: 116,388,364.98
Step by Step Solution
- Step 1: Write the proportion equation
128,963,709.20 : 193,193,621.40 = 77,693,430.80 : x - Step 2: Convert to fraction form
128,963,709.20/193,193,621.40 = 77,693,430.80/x - Step 3: Cross multiply
128,963,709.20x = 193,193,621.40 × 77,693,430.80 - Step 4: Simplify right side
128,963,709.20x = 15,009,875,255,242,300 - Step 5: Solve for x
x = 15,009,875,255,242,300/128,963,709.20 - Step 6: Final answer
x = 116,388,364.98
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.