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Finding the Fourth Proportional to 72,907.13, 100,557.51 and 64,740.62

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Solution

The fourth proportional to 72,907.13, 100,557.51 and 64,740.62 is: 89,293.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.13 : 100,557.51 = 64,740.62 : x
  2. Step 2: Convert to fraction form
    72,907.13/100,557.51 = 64,740.62/x
  3. Step 3: Cross multiply
    72,907.13x = 100,557.51 × 64,740.62
  4. Step 4: Simplify right side
    72,907.13x = 6,510,155,543.06
  5. Step 5: Solve for x
    x = 6,510,155,543.06/72,907.13
  6. Step 6: Final answer
    x = 89,293.81

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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.