Home / 260,111.40-390,167.10-134,140.20

Finding the Fourth Proportional to 260,111.40, 390,167.10 and 134,140.20

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Solution

The fourth proportional to 260,111.40, 390,167.10 and 134,140.20 is: 201,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,111.40 : 390,167.10 = 134,140.20 : x
  2. Step 2: Convert to fraction form
    260,111.40/390,167.10 = 134,140.20/x
  3. Step 3: Cross multiply
    260,111.40x = 390,167.10 × 134,140.20
  4. Step 4: Simplify right side
    260,111.40x = 52,337,092,827.42
  5. Step 5: Solve for x
    x = 52,337,092,827.42/260,111.40
  6. Step 6: Final answer
    x = 201,210.30

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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.