Home / 156,320.47-215,721.59-84,700.78

Finding the Fourth Proportional to 156,320.47, 215,721.59 and 84,700.78

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Solution

The fourth proportional to 156,320.47, 215,721.59 and 84,700.78 is: 116,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,320.47 : 215,721.59 = 84,700.78 : x
  2. Step 2: Convert to fraction form
    156,320.47/215,721.59 = 84,700.78/x
  3. Step 3: Cross multiply
    156,320.47x = 215,721.59 × 84,700.78
  4. Step 4: Simplify right side
    156,320.47x = 18,271,786,935.84
  5. Step 5: Solve for x
    x = 18,271,786,935.84/156,320.47
  6. Step 6: Final answer
    x = 116,886.72

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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.