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Finding the Fourth Proportional to 139,560.32, 192,572.16 and 85,854.08

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Solution

The fourth proportional to 139,560.32, 192,572.16 and 85,854.08 is: 118,465.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,560.32 : 192,572.16 = 85,854.08 : x
  2. Step 2: Convert to fraction form
    139,560.32/192,572.16 = 85,854.08/x
  3. Step 3: Cross multiply
    139,560.32x = 192,572.16 × 85,854.08
  4. Step 4: Simplify right side
    139,560.32x = 16,533,105,630.41
  5. Step 5: Solve for x
    x = 16,533,105,630.41/139,560.32
  6. Step 6: Final answer
    x = 118,465.66

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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.