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Finding the Fourth Proportional to 228,931.61, 315,925.62 and 128,329.61

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Solution

The fourth proportional to 228,931.61, 315,925.62 and 128,329.61 is: 177,094.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,931.61 : 315,925.62 = 128,329.61 : x
  2. Step 2: Convert to fraction form
    228,931.61/315,925.62 = 128,329.61/x
  3. Step 3: Cross multiply
    228,931.61x = 315,925.62 × 128,329.61
  4. Step 4: Simplify right side
    228,931.61x = 40,542,611,603.61
  5. Step 5: Solve for x
    x = 40,542,611,603.61/228,931.61
  6. Step 6: Final answer
    x = 177,094.86

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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.