Home / 86,543.10-129,814.65-42,256.35

Finding the Fourth Proportional to 86,543.10, 129,814.65 and 42,256.35

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Solution

The fourth proportional to 86,543.10, 129,814.65 and 42,256.35 is: 63,384.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,543.10 : 129,814.65 = 42,256.35 : x
  2. Step 2: Convert to fraction form
    86,543.10/129,814.65 = 42,256.35/x
  3. Step 3: Cross multiply
    86,543.10x = 129,814.65 × 42,256.35
  4. Step 4: Simplify right side
    86,543.10x = 5,485,493,285.53
  5. Step 5: Solve for x
    x = 5,485,493,285.53/86,543.10
  6. Step 6: Final answer
    x = 63,384.53

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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.