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Finding the Fourth Proportional to 100,302.30, 138,510.81 and 64,554.57

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Solution

The fourth proportional to 100,302.30, 138,510.81 and 64,554.57 is: 89,145.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,302.30 : 138,510.81 = 64,554.57 : x
  2. Step 2: Convert to fraction form
    100,302.30/138,510.81 = 64,554.57/x
  3. Step 3: Cross multiply
    100,302.30x = 138,510.81 × 64,554.57
  4. Step 4: Simplify right side
    100,302.30x = 8,941,505,779.90
  5. Step 5: Solve for x
    x = 8,941,505,779.90/100,302.30
  6. Step 6: Final answer
    x = 89,145.57

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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.