Finding the Fourth Proportional to 128,521,107.36, 177,357,312.24 and 72,765,089.04
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Solution
The fourth proportional to 128,521,107.36, 177,357,312.24 and 72,765,089.04 is: 100,414,794.75
Step by Step Solution
- Step 1: Write the proportion equation
128,521,107.36 : 177,357,312.24 = 72,765,089.04 : x - Step 2: Convert to fraction form
128,521,107.36/177,357,312.24 = 72,765,089.04/x - Step 3: Cross multiply
128,521,107.36x = 177,357,312.24 × 72,765,089.04 - Step 4: Simplify right side
128,521,107.36x = 12,905,420,617,038,684 - Step 5: Solve for x
x = 12,905,420,617,038,684/128,521,107.36 - Step 6: Final answer
x = 100,414,794.75
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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.