Home / 156,421.13-215,746.51-102,686.54

Finding the Fourth Proportional to 156,421.13, 215,746.51 and 102,686.54

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Solution

The fourth proportional to 156,421.13, 215,746.51 and 102,686.54 is: 141,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,421.13 : 215,746.51 = 102,686.54 : x
  2. Step 2: Convert to fraction form
    156,421.13/215,746.51 = 102,686.54/x
  3. Step 3: Cross multiply
    156,421.13x = 215,746.51 × 102,686.54
  4. Step 4: Simplify right side
    156,421.13x = 22,154,262,911.63
  5. Step 5: Solve for x
    x = 22,154,262,911.63/156,421.13
  6. Step 6: Final answer
    x = 141,632.16

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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.