Home / 90,385.76-124,690.16-56,870.24

Finding the Fourth Proportional to 90,385.76, 124,690.16 and 56,870.24

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Solution

The fourth proportional to 90,385.76, 124,690.16 and 56,870.24 is: 78,454.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,385.76 : 124,690.16 = 56,870.24 : x
  2. Step 2: Convert to fraction form
    90,385.76/124,690.16 = 56,870.24/x
  3. Step 3: Cross multiply
    90,385.76x = 124,690.16 × 56,870.24
  4. Step 4: Simplify right side
    90,385.76x = 7,091,159,324.84
  5. Step 5: Solve for x
    x = 7,091,159,324.84/90,385.76
  6. Step 6: Final answer
    x = 78,454.39

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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.