Home / 90,675.10-136,012.54-31,510.78

Finding the Fourth Proportional to 90,675.10, 136,012.54 and 31,510.78

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Solution

The fourth proportional to 90,675.10, 136,012.54 and 31,510.78 is: 47,266.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,675.10 : 136,012.54 = 31,510.78 : x
  2. Step 2: Convert to fraction form
    90,675.10/136,012.54 = 31,510.78/x
  3. Step 3: Cross multiply
    90,675.10x = 136,012.54 × 31,510.78
  4. Step 4: Simplify right side
    90,675.10x = 4,285,861,225.18
  5. Step 5: Solve for x
    x = 4,285,861,225.18/90,675.10
  6. Step 6: Final answer
    x = 47,266.13

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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.