Home / 156,807.90-235,114.65-90,215.10

Finding the Fourth Proportional to 156,807.90, 235,114.65 and 90,215.10

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Solution

The fourth proportional to 156,807.90, 235,114.65 and 90,215.10 is: 135,266.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,807.90 : 235,114.65 = 90,215.10 : x
  2. Step 2: Convert to fraction form
    156,807.90/235,114.65 = 90,215.10/x
  3. Step 3: Cross multiply
    156,807.90x = 235,114.65 × 90,215.10
  4. Step 4: Simplify right side
    156,807.90x = 21,210,891,661.22
  5. Step 5: Solve for x
    x = 21,210,891,661.22/156,807.90
  6. Step 6: Final answer
    x = 135,266.73

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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.