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Finding the Fourth Proportional to 74,842.89, 112,312.98 and 39,807.15

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Solution

The fourth proportional to 74,842.89, 112,312.98 and 39,807.15 is: 59,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,842.89 : 112,312.98 = 39,807.15 : x
  2. Step 2: Convert to fraction form
    74,842.89/112,312.98 = 39,807.15/x
  3. Step 3: Cross multiply
    74,842.89x = 112,312.98 × 39,807.15
  4. Step 4: Simplify right side
    74,842.89x = 4,470,859,641.81
  5. Step 5: Solve for x
    x = 4,470,859,641.81/74,842.89
  6. Step 6: Final answer
    x = 59,736.60

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1.5x scale

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.