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Finding the Fourth Proportional to 112,646.90, 155,450.40 and 61,658.40

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Solution

The fourth proportional to 112,646.90, 155,450.40 and 61,658.40 is: 85,087.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,646.90 : 155,450.40 = 61,658.40 : x
  2. Step 2: Convert to fraction form
    112,646.90/155,450.40 = 61,658.40/x
  3. Step 3: Cross multiply
    112,646.90x = 155,450.40 × 61,658.40
  4. Step 4: Simplify right side
    112,646.90x = 9,584,822,943.36
  5. Step 5: Solve for x
    x = 9,584,822,943.36/112,646.90
  6. Step 6: Final answer
    x = 85,087.32

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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.