Home / 91,315.80-136,909.08-31,315.50

Finding the Fourth Proportional to 91,315.80, 136,909.08 and 31,315.50

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Solution

The fourth proportional to 91,315.80, 136,909.08 and 31,315.50 is: 46,951.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,315.80 : 136,909.08 = 31,315.50 : x
  2. Step 2: Convert to fraction form
    91,315.80/136,909.08 = 31,315.50/x
  3. Step 3: Cross multiply
    91,315.80x = 136,909.08 × 31,315.50
  4. Step 4: Simplify right side
    91,315.80x = 4,287,376,294.74
  5. Step 5: Solve for x
    x = 4,287,376,294.74/91,315.80
  6. Step 6: Final answer
    x = 46,951.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.