Home / 156,641.03-216,146.64-87,720.87

Finding the Fourth Proportional to 156,641.03, 216,146.64 and 87,720.87

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Solution

The fourth proportional to 156,641.03, 216,146.64 and 87,720.87 is: 121,044.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,641.03 : 216,146.64 = 87,720.87 : x
  2. Step 2: Convert to fraction form
    156,641.03/216,146.64 = 87,720.87/x
  3. Step 3: Cross multiply
    156,641.03x = 216,146.64 × 87,720.87
  4. Step 4: Simplify right side
    156,641.03x = 18,960,572,077.81
  5. Step 5: Solve for x
    x = 18,960,572,077.81/156,641.03
  6. Step 6: Final answer
    x = 121,044.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.