Home / 91,701.68-136,931.58-72,769.20

Finding the Fourth Proportional to 91,701.68, 136,931.58 and 72,769.20

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Solution

The fourth proportional to 91,701.68, 136,931.58 and 72,769.20 is: 108,661.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,701.68 : 136,931.58 = 72,769.20 : x
  2. Step 2: Convert to fraction form
    91,701.68/136,931.58 = 72,769.20/x
  3. Step 3: Cross multiply
    91,701.68x = 136,931.58 × 72,769.20
  4. Step 4: Simplify right side
    91,701.68x = 9,964,401,531.34
  5. Step 5: Solve for x
    x = 9,964,401,531.34/91,701.68
  6. Step 6: Final answer
    x = 108,661.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.