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Finding the Fourth Proportional to 71,765.04, 99,036.40 and 39,935.28

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Solution

The fourth proportional to 71,765.04, 99,036.40 and 39,935.28 is: 55,111.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,765.04 : 99,036.40 = 39,935.28 : x
  2. Step 2: Convert to fraction form
    71,765.04/99,036.40 = 39,935.28/x
  3. Step 3: Cross multiply
    71,765.04x = 99,036.40 × 39,935.28
  4. Step 4: Simplify right side
    71,765.04x = 3,955,046,364.19
  5. Step 5: Solve for x
    x = 3,955,046,364.19/71,765.04
  6. Step 6: Final answer
    x = 55,111.05

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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.