Home / 105,931.47-145,969.90-98,457.40

Finding the Fourth Proportional to 105,931.47, 145,969.90 and 98,457.40

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Solution

The fourth proportional to 105,931.47, 145,969.90 and 98,457.40 is: 135,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,931.47 : 145,969.90 = 98,457.40 : x
  2. Step 2: Convert to fraction form
    105,931.47/145,969.90 = 98,457.40/x
  3. Step 3: Cross multiply
    105,931.47x = 145,969.90 × 98,457.40
  4. Step 4: Simplify right side
    105,931.47x = 14,371,816,832.26
  5. Step 5: Solve for x
    x = 14,371,816,832.26/105,931.47
  6. Step 6: Final answer
    x = 135,670.89

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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.