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Finding the Fourth Proportional to 139,415.59, 192,444.29 and 85,772.53

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Solution

The fourth proportional to 139,415.59, 192,444.29 and 85,772.53 is: 118,397.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.59 : 192,444.29 = 85,772.53 : x
  2. Step 2: Convert to fraction form
    139,415.59/192,444.29 = 85,772.53/x
  3. Step 3: Cross multiply
    139,415.59x = 192,444.29 × 85,772.53
  4. Step 4: Simplify right side
    139,415.59x = 16,506,433,637.35
  5. Step 5: Solve for x
    x = 16,506,433,637.35/139,415.59
  6. Step 6: Final answer
    x = 118,397.33

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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.