Home / 78,376.78-108,159.02-42,567.08

Finding the Fourth Proportional to 78,376.78, 108,159.02 and 42,567.08

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Solution

The fourth proportional to 78,376.78, 108,159.02 and 42,567.08 is: 58,742.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,376.78 : 108,159.02 = 42,567.08 : x
  2. Step 2: Convert to fraction form
    78,376.78/108,159.02 = 42,567.08/x
  3. Step 3: Cross multiply
    78,376.78x = 108,159.02 × 42,567.08
  4. Step 4: Simplify right side
    78,376.78x = 4,604,013,657.06
  5. Step 5: Solve for x
    x = 4,604,013,657.06/78,376.78
  6. Step 6: Final answer
    x = 58,742.06

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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.