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Finding the Fourth Proportional to 74,612.76, 102,962.52 and 42,779.76

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Solution

The fourth proportional to 74,612.76, 102,962.52 and 42,779.76 is: 59,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,612.76 : 102,962.52 = 42,779.76 : x
  2. Step 2: Convert to fraction form
    74,612.76/102,962.52 = 42,779.76/x
  3. Step 3: Cross multiply
    74,612.76x = 102,962.52 × 42,779.76
  4. Step 4: Simplify right side
    74,612.76x = 4,404,711,894.60
  5. Step 5: Solve for x
    x = 4,404,711,894.60/74,612.76
  6. Step 6: Final answer
    x = 59,034.30

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1.5x scale

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.