Home / 90,143,999.40-135,215,999.10-54,312,191.40

Finding the Fourth Proportional to 90,143,999.40, 135,215,999.10 and 54,312,191.40

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Solution

The fourth proportional to 90,143,999.40, 135,215,999.10 and 54,312,191.40 is: 81,468,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,143,999.40 : 135,215,999.10 = 54,312,191.40 : x
  2. Step 2: Convert to fraction form
    90,143,999.40/135,215,999.10 = 54,312,191.40/x
  3. Step 3: Cross multiply
    90,143,999.40x = 135,215,999.10 × 54,312,191.40
  4. Step 4: Simplify right side
    90,143,999.40x = 7,343,877,223,461,427
  5. Step 5: Solve for x
    x = 7,343,877,223,461,427/90,143,999.40
  6. Step 6: Final answer
    x = 81,468,287.10

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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.