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Finding the Fourth Proportional to 60,689.76, 91,034.64 and 19,140

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Solution

The fourth proportional to 60,689.76, 91,034.64 and 19,140 is: 28,710.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,689.76 : 91,034.64 = 19,140 : x
  2. Step 2: Convert to fraction form
    60,689.76/91,034.64 = 19,140/x
  3. Step 3: Cross multiply
    60,689.76x = 91,034.64 × 19,140
  4. Step 4: Simplify right side
    60,689.76x = 1,742,403,009.60
  5. Step 5: Solve for x
    x = 1,742,403,009.60/60,689.76
  6. Step 6: Final answer
    x = 28,710.00

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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.