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Finding the Fourth Proportional to 89,852.90, 134,779.35 and 72,356.90

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Solution

The fourth proportional to 89,852.90, 134,779.35 and 72,356.90 is: 108,535.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,852.90 : 134,779.35 = 72,356.90 : x
  2. Step 2: Convert to fraction form
    89,852.90/134,779.35 = 72,356.90/x
  3. Step 3: Cross multiply
    89,852.90x = 134,779.35 × 72,356.90
  4. Step 4: Simplify right side
    89,852.90x = 9,752,215,950.02
  5. Step 5: Solve for x
    x = 9,752,215,950.02/89,852.90
  6. Step 6: Final answer
    x = 108,535.35

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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.