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Finding the Fourth Proportional to 224,345.10, 309,603.15 and 128,870.94

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Solution

The fourth proportional to 224,345.10, 309,603.15 and 128,870.94 is: 177,845.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,345.10 : 309,603.15 = 128,870.94 : x
  2. Step 2: Convert to fraction form
    224,345.10/309,603.15 = 128,870.94/x
  3. Step 3: Cross multiply
    224,345.10x = 309,603.15 × 128,870.94
  4. Step 4: Simplify right side
    224,345.10x = 39,898,848,967.46
  5. Step 5: Solve for x
    x = 39,898,848,967.46/224,345.10
  6. Step 6: Final answer
    x = 177,845.87

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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.