Home / 90,866.50-125,403.45-51,130.18

Finding the Fourth Proportional to 90,866.50, 125,403.45 and 51,130.18

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Solution

The fourth proportional to 90,866.50, 125,403.45 and 51,130.18 is: 70,563.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.50 : 125,403.45 = 51,130.18 : x
  2. Step 2: Convert to fraction form
    90,866.50/125,403.45 = 51,130.18/x
  3. Step 3: Cross multiply
    90,866.50x = 125,403.45 × 51,130.18
  4. Step 4: Simplify right side
    90,866.50x = 6,411,900,971.12
  5. Step 5: Solve for x
    x = 6,411,900,971.12/90,866.50
  6. Step 6: Final answer
    x = 70,563.97

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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.