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Finding the Fourth Proportional to 66,988.77, 100,502.88 and 26,987.16

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Solution

The fourth proportional to 66,988.77, 100,502.88 and 26,987.16 is: 40,488.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,988.77 : 100,502.88 = 26,987.16 : x
  2. Step 2: Convert to fraction form
    66,988.77/100,502.88 = 26,987.16/x
  3. Step 3: Cross multiply
    66,988.77x = 100,502.88 × 26,987.16
  4. Step 4: Simplify right side
    66,988.77x = 2,712,287,303.02
  5. Step 5: Solve for x
    x = 2,712,287,303.02/66,988.77
  6. Step 6: Final answer
    x = 40,488.69

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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.