Home / 90,428,467.20-135,642,700.80-86,271,417.60

Finding the Fourth Proportional to 90,428,467.20, 135,642,700.80 and 86,271,417.60

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Solution

The fourth proportional to 90,428,467.20, 135,642,700.80 and 86,271,417.60 is: 129,407,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428,467.20 : 135,642,700.80 = 86,271,417.60 : x
  2. Step 2: Convert to fraction form
    90,428,467.20/135,642,700.80 = 86,271,417.60/x
  3. Step 3: Cross multiply
    90,428,467.20x = 135,642,700.80 × 86,271,417.60
  4. Step 4: Simplify right side
    90,428,467.20x = 11,702,088,085,108,654
  5. Step 5: Solve for x
    x = 11,702,088,085,108,654/90,428,467.20
  6. Step 6: Final answer
    x = 129,407,126.40

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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.