Home / 105,386.36-145,430.07-57,638.67

Finding the Fourth Proportional to 105,386.36, 145,430.07 and 57,638.67

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Solution

The fourth proportional to 105,386.36, 145,430.07 and 57,638.67 is: 79,539.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,386.36 : 145,430.07 = 57,638.67 : x
  2. Step 2: Convert to fraction form
    105,386.36/145,430.07 = 57,638.67/x
  3. Step 3: Cross multiply
    105,386.36x = 145,430.07 × 57,638.67
  4. Step 4: Simplify right side
    105,386.36x = 8,382,395,812.81
  5. Step 5: Solve for x
    x = 8,382,395,812.81/105,386.36
  6. Step 6: Final answer
    x = 79,539.67

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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.