Home / 145,746.10-218,489.55-86,518.90

Finding the Fourth Proportional to 145,746.10, 218,489.55 and 86,518.90

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Solution

The fourth proportional to 145,746.10, 218,489.55 and 86,518.90 is: 129,701.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,746.10 : 218,489.55 = 86,518.90 : x
  2. Step 2: Convert to fraction form
    145,746.10/218,489.55 = 86,518.90/x
  3. Step 3: Cross multiply
    145,746.10x = 218,489.55 × 86,518.90
  4. Step 4: Simplify right side
    145,746.10x = 18,903,475,527.50
  5. Step 5: Solve for x
    x = 18,903,475,527.50/145,746.10
  6. Step 6: Final answer
    x = 129,701.42

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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.