Home / 145,931.10-218,896.65-139,710.30

Finding the Fourth Proportional to 145,931.10, 218,896.65 and 139,710.30

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Solution

The fourth proportional to 145,931.10, 218,896.65 and 139,710.30 is: 209,565.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,931.10 : 218,896.65 = 139,710.30 : x
  2. Step 2: Convert to fraction form
    145,931.10/218,896.65 = 139,710.30/x
  3. Step 3: Cross multiply
    145,931.10x = 218,896.65 × 139,710.30
  4. Step 4: Simplify right side
    145,931.10x = 30,582,116,640.50
  5. Step 5: Solve for x
    x = 30,582,116,640.50/145,931.10
  6. Step 6: Final answer
    x = 209,565.45

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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.