Home / 112,990.16-155,938.70-72,191.55

Finding the Fourth Proportional to 112,990.16, 155,938.70 and 72,191.55

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Solution

The fourth proportional to 112,990.16, 155,938.70 and 72,191.55 is: 99,632.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,990.16 : 155,938.70 = 72,191.55 : x
  2. Step 2: Convert to fraction form
    112,990.16/155,938.70 = 72,191.55/x
  3. Step 3: Cross multiply
    112,990.16x = 155,938.70 × 72,191.55
  4. Step 4: Simplify right side
    112,990.16x = 11,257,457,223.23
  5. Step 5: Solve for x
    x = 11,257,457,223.23/112,990.16
  6. Step 6: Final answer
    x = 99,632.19

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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.