Home / 90,737.10-136,117.80-31,590.90

Finding the Fourth Proportional to 90,737.10, 136,117.80 and 31,590.90

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Solution

The fourth proportional to 90,737.10, 136,117.80 and 31,590.90 is: 47,390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,737.10 : 136,117.80 = 31,590.90 : x
  2. Step 2: Convert to fraction form
    90,737.10/136,117.80 = 31,590.90/x
  3. Step 3: Cross multiply
    90,737.10x = 136,117.80 × 31,590.90
  4. Step 4: Simplify right side
    90,737.10x = 4,300,083,808.02
  5. Step 5: Solve for x
    x = 4,300,083,808.02/90,737.10
  6. Step 6: Final answer
    x = 47,390.58

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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.