Home / 145,931.08-201,385.04-78,863.08

Finding the Fourth Proportional to 145,931.08, 201,385.04 and 78,863.08

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Solution

The fourth proportional to 145,931.08, 201,385.04 and 78,863.08 is: 108,831.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,931.08 : 201,385.04 = 78,863.08 : x
  2. Step 2: Convert to fraction form
    145,931.08/201,385.04 = 78,863.08/x
  3. Step 3: Cross multiply
    145,931.08x = 201,385.04 × 78,863.08
  4. Step 4: Simplify right side
    145,931.08x = 15,881,844,520.32
  5. Step 5: Solve for x
    x = 15,881,844,520.32/145,931.08
  6. Step 6: Final answer
    x = 108,831.13

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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.