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Finding the Fourth Proportional to 74,988.72, 103,494.88 and 72,527.36

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Solution

The fourth proportional to 74,988.72, 103,494.88 and 72,527.36 is: 100,097.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,988.72 : 103,494.88 = 72,527.36 : x
  2. Step 2: Convert to fraction form
    74,988.72/103,494.88 = 72,527.36/x
  3. Step 3: Cross multiply
    74,988.72x = 103,494.88 × 72,527.36
  4. Step 4: Simplify right side
    74,988.72x = 7,506,210,419.92
  5. Step 5: Solve for x
    x = 7,506,210,419.92/74,988.72
  6. Step 6: Final answer
    x = 100,097.86

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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.