Home / 72,030.11-99,407.06-39,770.96

Finding the Fourth Proportional to 72,030.11, 99,407.06 and 39,770.96

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Solution

The fourth proportional to 72,030.11, 99,407.06 and 39,770.96 is: 54,886.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,030.11 : 99,407.06 = 39,770.96 : x
  2. Step 2: Convert to fraction form
    72,030.11/99,407.06 = 39,770.96/x
  3. Step 3: Cross multiply
    72,030.11x = 99,407.06 × 39,770.96
  4. Step 4: Simplify right side
    72,030.11x = 3,953,513,511.09
  5. Step 5: Solve for x
    x = 3,953,513,511.09/72,030.11
  6. Step 6: Final answer
    x = 54,886.96

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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.