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Finding the Fourth Proportional to 112,643.40, 155,441.52 and 61,646.52

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Solution

The fourth proportional to 112,643.40, 155,441.52 and 61,646.52 is: 85,068.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,643.40 : 155,441.52 = 61,646.52 : x
  2. Step 2: Convert to fraction form
    112,643.40/155,441.52 = 61,646.52/x
  3. Step 3: Cross multiply
    112,643.40x = 155,441.52 × 61,646.52
  4. Step 4: Simplify right side
    112,643.40x = 9,582,428,771.51
  5. Step 5: Solve for x
    x = 9,582,428,771.51/112,643.40
  6. Step 6: Final answer
    x = 85,068.71

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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.