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Finding the Fourth Proportional to 134,487.68, 201,667.05 and 78,343.74

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Solution

The fourth proportional to 134,487.68, 201,667.05 and 78,343.74 is: 117,478.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,487.68 : 201,667.05 = 78,343.74 : x
  2. Step 2: Convert to fraction form
    134,487.68/201,667.05 = 78,343.74/x
  3. Step 3: Cross multiply
    134,487.68x = 201,667.05 × 78,343.74
  4. Step 4: Simplify right side
    134,487.68x = 15,799,350,931.77
  5. Step 5: Solve for x
    x = 15,799,350,931.77/134,487.68
  6. Step 6: Final answer
    x = 117,478.06

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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.