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Finding the Fourth Proportional to 65,421.78, 90,281.81 and 36,737.46

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Solution

The fourth proportional to 65,421.78, 90,281.81 and 36,737.46 is: 50,697.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,421.78 : 90,281.81 = 36,737.46 : x
  2. Step 2: Convert to fraction form
    65,421.78/90,281.81 = 36,737.46/x
  3. Step 3: Cross multiply
    65,421.78x = 90,281.81 × 36,737.46
  4. Step 4: Simplify right side
    65,421.78x = 3,316,724,199.92
  5. Step 5: Solve for x
    x = 3,316,724,199.92/65,421.78
  6. Step 6: Final answer
    x = 50,697.55

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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.