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Finding the Fourth Proportional to 156,751.60, 235,228.20 and 86,681.20

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Solution

The fourth proportional to 156,751.60, 235,228.20 and 86,681.20 is: 130,077.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,751.60 : 235,228.20 = 86,681.20 : x
  2. Step 2: Convert to fraction form
    156,751.60/235,228.20 = 86,681.20/x
  3. Step 3: Cross multiply
    156,751.60x = 235,228.20 × 86,681.20
  4. Step 4: Simplify right side
    156,751.60x = 20,389,862,649.84
  5. Step 5: Solve for x
    x = 20,389,862,649.84/156,751.60
  6. Step 6: Final answer
    x = 130,077.54

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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.