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Finding the Fourth Proportional to 152,385.70, 212,815.10 and 152,385.70

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Solution

The fourth proportional to 152,385.70, 212,815.10 and 152,385.70 is: 212,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,385.70 : 212,815.10 = 152,385.70 : x
  2. Step 2: Convert to fraction form
    152,385.70/212,815.10 = 152,385.70/x
  3. Step 3: Cross multiply
    152,385.70x = 212,815.10 × 152,385.70
  4. Step 4: Simplify right side
    152,385.70x = 32,429,977,984.07
  5. Step 5: Solve for x
    x = 32,429,977,984.07/152,385.70
  6. Step 6: Final answer
    x = 212,815.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.