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Finding the Fourth Proportional to 125,392.55, 173,041.72 and 71,678.72

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Solution

The fourth proportional to 125,392.55, 173,041.72 and 71,678.72 is: 98,916.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,392.55 : 173,041.72 = 71,678.72 : x
  2. Step 2: Convert to fraction form
    125,392.55/173,041.72 = 71,678.72/x
  3. Step 3: Cross multiply
    125,392.55x = 173,041.72 × 71,678.72
  4. Step 4: Simplify right side
    125,392.55x = 12,403,409,249.61
  5. Step 5: Solve for x
    x = 12,403,409,249.61/125,392.55
  6. Step 6: Final answer
    x = 98,916.64

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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.