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Finding the Fourth Proportional to 71,920.36, 99,247.80 and 45,077.36

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Solution

The fourth proportional to 71,920.36, 99,247.80 and 45,077.36 is: 62,205.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,920.36 : 99,247.80 = 45,077.36 : x
  2. Step 2: Convert to fraction form
    71,920.36/99,247.80 = 45,077.36/x
  3. Step 3: Cross multiply
    71,920.36x = 99,247.80 × 45,077.36
  4. Step 4: Simplify right side
    71,920.36x = 4,473,828,809.81
  5. Step 5: Solve for x
    x = 4,473,828,809.81/71,920.36
  6. Step 6: Final answer
    x = 62,205.32

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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.