Home / 74,130.40-102,300.14-40,139.30

Finding the Fourth Proportional to 74,130.40, 102,300.14 and 40,139.30

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Solution

The fourth proportional to 74,130.40, 102,300.14 and 40,139.30 is: 55,392.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,130.40 : 102,300.14 = 40,139.30 : x
  2. Step 2: Convert to fraction form
    74,130.40/102,300.14 = 40,139.30/x
  3. Step 3: Cross multiply
    74,130.40x = 102,300.14 × 40,139.30
  4. Step 4: Simplify right side
    74,130.40x = 4,106,256,009.50
  5. Step 5: Solve for x
    x = 4,106,256,009.50/74,130.40
  6. Step 6: Final answer
    x = 55,392.34

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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.