Home / 105,457.95-145,531.28-57,711.15

Finding the Fourth Proportional to 105,457.95, 145,531.28 and 57,711.15

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Solution

The fourth proportional to 105,457.95, 145,531.28 and 57,711.15 is: 79,641.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,457.95 : 145,531.28 = 57,711.15 : x
  2. Step 2: Convert to fraction form
    105,457.95/145,531.28 = 57,711.15/x
  3. Step 3: Cross multiply
    105,457.95x = 145,531.28 × 57,711.15
  4. Step 4: Simplify right side
    105,457.95x = 8,398,777,674.05
  5. Step 5: Solve for x
    x = 8,398,777,674.05/105,457.95
  6. Step 6: Final answer
    x = 79,641.01

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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.