Home / 112,509.29-155,139.11-72,207.74

Finding the Fourth Proportional to 112,509.29, 155,139.11 and 72,207.74

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Solution

The fourth proportional to 112,509.29, 155,139.11 and 72,207.74 is: 99,567.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,509.29 : 155,139.11 = 72,207.74 : x
  2. Step 2: Convert to fraction form
    112,509.29/155,139.11 = 72,207.74/x
  3. Step 3: Cross multiply
    112,509.29x = 155,139.11 × 72,207.74
  4. Step 4: Simplify right side
    112,509.29x = 11,202,244,518.71
  5. Step 5: Solve for x
    x = 11,202,244,518.71/112,509.29
  6. Step 6: Final answer
    x = 99,567.28

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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.