Home / 87,315.40-130,886.70-42,905.80

Finding the Fourth Proportional to 87,315.40, 130,886.70 and 42,905.80

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Solution

The fourth proportional to 87,315.40, 130,886.70 and 42,905.80 is: 64,316.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,315.40 : 130,886.70 = 42,905.80 : x
  2. Step 2: Convert to fraction form
    87,315.40/130,886.70 = 42,905.80/x
  3. Step 3: Cross multiply
    87,315.40x = 130,886.70 × 42,905.80
  4. Step 4: Simplify right side
    87,315.40x = 5,615,798,572.86
  5. Step 5: Solve for x
    x = 5,615,798,572.86/87,315.40
  6. Step 6: Final answer
    x = 64,316.24

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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.