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Finding the Fourth Proportional to 66,510.32, 99,763.04 and 19,761.98

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Solution

The fourth proportional to 66,510.32, 99,763.04 and 19,761.98 is: 29,642.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,510.32 : 99,763.04 = 19,761.98 : x
  2. Step 2: Convert to fraction form
    66,510.32/99,763.04 = 19,761.98/x
  3. Step 3: Cross multiply
    66,510.32x = 99,763.04 × 19,761.98
  4. Step 4: Simplify right side
    66,510.32x = 1,971,514,751.81
  5. Step 5: Solve for x
    x = 1,971,514,751.81/66,510.32
  6. Step 6: Final answer
    x = 29,642.24

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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.