Home / 142,785.20-213,918.60-87,316.40

Finding the Fourth Proportional to 142,785.20, 213,918.60 and 87,316.40

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Solution

The fourth proportional to 142,785.20, 213,918.60 and 87,316.40 is: 130,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,785.20 : 213,918.60 = 87,316.40 : x
  2. Step 2: Convert to fraction form
    142,785.20/213,918.60 = 87,316.40/x
  3. Step 3: Cross multiply
    142,785.20x = 213,918.60 × 87,316.40
  4. Step 4: Simplify right side
    142,785.20x = 18,678,602,045.04
  5. Step 5: Solve for x
    x = 18,678,602,045.04/142,785.20
  6. Step 6: Final answer
    x = 130,816.09

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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.