Finding the Fourth Proportional to 100,907.99, 139,242.56 and 62,139.65
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Solution
The fourth proportional to 100,907.99, 139,242.56 and 62,139.65 is: 85,746.28
Step by Step Solution
- Step 1: Write the proportion equation
100,907.99 : 139,242.56 = 62,139.65 : x - Step 2: Convert to fraction form
100,907.99/139,242.56 = 62,139.65/x - Step 3: Cross multiply
100,907.99x = 139,242.56 × 62,139.65 - Step 4: Simplify right side
100,907.99x = 8,652,483,980.91 - Step 5: Solve for x
x = 8,652,483,980.91/100,907.99 - Step 6: Final answer
x = 85,746.28
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1.5x scale
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.