Home / 76,120.13-105,045.96-42,130.94

Finding the Fourth Proportional to 76,120.13, 105,045.96 and 42,130.94

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Solution

The fourth proportional to 76,120.13, 105,045.96 and 42,130.94 is: 58,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,120.13 : 105,045.96 = 42,130.94 : x
  2. Step 2: Convert to fraction form
    76,120.13/105,045.96 = 42,130.94/x
  3. Step 3: Cross multiply
    76,120.13x = 105,045.96 × 42,130.94
  4. Step 4: Simplify right side
    76,120.13x = 4,425,685,038.00
  5. Step 5: Solve for x
    x = 4,425,685,038.00/76,120.13
  6. Step 6: Final answer
    x = 58,140.80

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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.